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1010021985 = 32576747857
BaseRepresentation
bin111100001100111…
…011011001100001
32121101112102200200
4330030323121201
54032031200420
6244120135413
734013021340
oct7414733141
92541472620
101010021985
11479149515
12242307569
13131338a5b
14981d9b57
155da10b90
hex3c33b661

1010021985 has 48 divisors (see below), whose sum is σ = 2030710656. Its totient is φ = 454823424.

The previous prime is 1010021981. The next prime is 1010021989. The reversal of 1010021985 is 5891200101.

It is an interprime number because it is at equal distance from previous prime (1010021981) and next prime (1010021989).

It is not a de Polignac number, because 1010021985 - 22 = 1010021981 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1010021981) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2824 + ... + 45033.

It is an arithmetic number, because the mean of its divisors is an integer number (42306472).

Almost surely, 21010021985 is an apocalyptic number.

1010021985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1010021985 is an abundant number, since it is smaller than the sum of its proper divisors (1020688671).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1010021985 is a wasteful number, since it uses less digits than its factorization.

1010021985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47942 (or 47939 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 27.

The square root of 1010021985 is about 31780.8430504919. The cubic root of 1010021985 is about 1003.3295633706.

The spelling of 1010021985 in words is "one billion, ten million, twenty-one thousand, nine hundred eighty-five".

Divisors: 1 3 5 7 9 15 21 35 45 63 67 105 201 315 335 469 603 1005 1407 2345 3015 4221 7035 21105 47857 143571 239285 334999 430713 717855 1004997 1674995 2153565 3014991 3206419 5024985 9619257 15074955 16032095 22444933 28857771 48096285 67334799 112224665 144288855 202004397 336673995 1010021985