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999999940 = 225118142337
BaseRepresentation
bin111011100110101…
…100100111000100
32120200200021000211
4323212230213010
54021444444230
6243121245204
733531600502
oct7346544704
92520607024
10999999940
11473523835
1223aa93804
1312c23a154
1496b4b672
155cbd142a
hex3b9ac9c4

999999940 has 24 divisors (see below), whose sum is σ = 2101827672. Its totient is φ = 399651840.

The previous prime is 999999937. The next prime is 1000000007. The reversal of 999999940 is 49999999.

It can be written as a sum of positive squares in 4 ways, for example, as 460274116 + 539725824 = 21454^2 + 23232^2 .

It is a nialpdrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2452 + ... + 44788.

It is an arithmetic number, because the mean of its divisors is an integer number (87576153).

Almost surely, 2999999940 is an apocalyptic number.

It is an amenable number.

999999940 is an abundant number, since it is smaller than the sum of its proper divisors (1101827732).

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

999999940 is a wasteful number, since it uses less digits than its factorization.

999999940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43527 (or 43525 counting only the distinct ones).

The product of its (nonzero) digits is 19131876, while the sum is 67.

The square root of 999999940 is about 31622.7756530005. The cubic root of 999999940 is about 999.9999800000. Note that the first 4 decimals are identical.

The spelling of 999999940 in words is "nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred forty".

Divisors: 1 2 4 5 10 20 1181 2362 4724 5905 11810 23620 42337 84674 169348 211685 423370 846740 49999997 99999994 199999988 249999985 499999970 999999940