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23045740 = 2251152287
BaseRepresentation
bin101011111101…
…0011001101100
31121100211210221
41113322121230
521344430430
62141541124
7366612514
oct127723154
947324727
1023045740
1112010673
1278747a4
134a0b843
1430bc844
15205357a
hex15fa66c

23045740 has 12 divisors (see below), whose sum is σ = 48396096. Its totient is φ = 9218288.

The previous prime is 23045723. The next prime is 23045753. The reversal of 23045740 is 4754032.

It is a super-2 number, since 2×230457402 = 1062212264295200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 576124 + ... + 576163.

It is an arithmetic number, because the mean of its divisors is an integer number (4033008).

Almost surely, 223045740 is an apocalyptic number.

23045740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23045740 is an abundant number, since it is smaller than the sum of its proper divisors (25350356).

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

23045740 is a wasteful number, since it uses less digits than its factorization.

23045740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1152296 (or 1152294 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 25.

The square root of 23045740 is about 4800.5978794313. The cubic root of 23045740 is about 284.5750926837.

Adding to 23045740 its reverse (4754032), we get a palindrome (27799772).

The spelling of 23045740 in words is "twenty-three million, forty-five thousand, seven hundred forty".

Divisors: 1 2 4 5 10 20 1152287 2304574 4609148 5761435 11522870 23045740