23190864 has 40 divisors (see below), whose sum is σ = 60641952. Its totient is φ = 7635840.

The previous prime is 23190847. The next prime is 23190901. The reversal of 23190864 is 46809132.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1074 + ... + 6894.

Almost surely, 2^23190864 is an apocalyptic number.

23190864 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23190864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30320976).

23190864 is an abundant number, since it is smaller than the sum of its proper divisors (37451088).

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

23190864 is a wasteful number, since it uses less digits than its factorization.

23190864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5915 (or 5909 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 23190864 is about 4815.6893587523. The cubic root of 23190864 is about 285.1711867827.

Adding to 23190864 its reverse (46809132), we get a palindrome (69999996).

The spelling of 23190864 in words is "twenty-three million, one hundred ninety thousand, eight hundred sixty-four".