23142690 has 24 divisors (see below), whose sum is σ = 60171228. Its totient is φ = 6171360.

The previous prime is 23142689. The next prime is 23142697. The reversal of 23142690 is 9624132.

23142690 is a `hidden beast` number, since 231 + 426 + 9 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 21930489 + 1212201 = 4683^2 + 1101^2 .

It is a super-2 number, since 2×23142690² = 1071168200872200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (23142697) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 128481 + ... + 128660.

Almost surely, 2^23142690 is an apocalyptic number.

23142690 is an abundant number, since it is smaller than the sum of its proper divisors (37028538).

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

23142690 is a wasteful number, since it uses less digits than its factorization.

23142690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257154 (or 257151 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 23142690 is about 4810.6849824115. The cubic root of 23142690 is about 284.9735894271.

It can be divided in two parts, 23142 and 690, that added together give a palindrome (23832).

The spelling of 23142690 in words is "twenty-three million, one hundred forty-two thousand, six hundred ninety".