23251690 has 32 divisors (see below), whose sum is σ = 52182144. Its totient is φ = 7247040.

The previous prime is 23251681. The next prime is 23251693. The reversal of 23251690 is 9615232.

It is a super-2 number, since 2×23251690² = 1081282175712200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (23251693) 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 15 ways as a sum of consecutive naturals, for example, 14329 + ... + 15868.

It is an arithmetic number, because the mean of its divisors is an integer number (1630692).

Almost surely, 2^23251690 is an apocalyptic number.

23251690 is an abundant number, since it is smaller than the sum of its proper divisors (28930454).

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

23251690 is a wasteful number, since it uses less digits than its factorization.

23251690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30222.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 23251690 is about 4822.0006221484. Note that the first 3 decimals coincide. The cubic root of 23251690 is about 285.4202888938.

The spelling of 23251690 in words is "twenty-three million, two hundred fifty-one thousand, six hundred ninety".