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1309862992 = 24212938453
BaseRepresentation
bin100111000010010…
…1110110001010000
310101021201221020011
41032010232301100
510140311103432
6333550524304
744313436354
oct11604566120
93337657204
101309862992
116124244a9
12306806694
1317b4ac379
14c5d6b464
1579edc847
hex4e12ec50

1309862992 has 20 divisors (see below), whose sum is σ = 2539117620. Its totient is φ = 654606848.

The previous prime is 1309862969. The next prime is 1309862993. The reversal of 1309862992 is 2992689031.

It can be written as a sum of positive squares in 2 ways, for example, as 501939216 + 807923776 = 22404^2 + 28424^2 .

It is a super-2 number, since 2×13098629922 = 3431482115622384128, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1309862993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14838 + ... + 53290.

It is an arithmetic number, because the mean of its divisors is an integer number (126955881).

Almost surely, 21309862992 is an apocalyptic number.

It is an amenable number.

1309862992 is a deficient number, since it is larger than the sum of its proper divisors (1229254628).

1309862992 is a wasteful number, since it uses less digits than its factorization.

1309862992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40590 (or 40584 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 49.

The square root of 1309862992 is about 36192.0293987502. The cubic root of 1309862992 is about 1094.1460344900.

The spelling of 1309862992 in words is "one billion, three hundred nine million, eight hundred sixty-two thousand, nine hundred ninety-two".

Divisors: 1 2 4 8 16 2129 4258 8516 17032 34064 38453 76906 153812 307624 615248 81866437 163732874 327465748 654931496 1309862992