23161690 has 16 divisors (see below), whose sum is σ = 43504128. Its totient is φ = 8861776.

The previous prime is 23161669. The next prime is 23161693. The reversal of 23161690 is 9616132.

It is a super-2 number, since 2×23161690² = 1072927767312200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (23161693) 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 7 ways as a sum of consecutive naturals, for example, 50122 + ... + 50581.

It is an arithmetic number, because the mean of its divisors is an integer number (2719008).

Almost surely, 2^23161690 is an apocalyptic number.

23161690 is a deficient number, since it is larger than the sum of its proper divisors (20342438).

23161690 is a wasteful number, since it uses less digits than its factorization.

23161690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100733.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 23161690 is about 4812.6593480112. The cubic root of 23161690 is about 285.0515552573.

The spelling of 23161690 in words is "twenty-three million, one hundred sixty-one thousand, six hundred ninety".