23291864 has 8 divisors (see below), whose sum is σ = 43672260. Its totient is φ = 11645928.

The previous prime is 23291861. The next prime is 23291897. The reversal of 23291864 is 46819232.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23291861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1455734 + ... + 1455749.

Almost surely, 2^23291864 is an apocalyptic number.

It is an amenable number.

23291864 is a deficient number, since it is larger than the sum of its proper divisors (20380396).

23291864 is a wasteful number, since it uses less digits than its factorization.

23291864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2911489 (or 2911485 counting only the distinct ones).

The product of its digits is 20736, while the sum is 35.

The square root of 23291864 is about 4826.1645226826. The cubic root of 23291864 is about 285.5845762659.

The spelling of 23291864 in words is "twenty-three million, two hundred ninety-one thousand, eight hundred sixty-four".