23440188 has 12 divisors (see below), whose sum is σ = 54693800. Its totient is φ = 7813392.

The previous prime is 23440171. The next prime is 23440217. The reversal of 23440188 is 88104432.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 976663 + ... + 976686.

Almost surely, 2^23440188 is an apocalyptic number.

It is an amenable number.

23440188 is an abundant number, since it is smaller than the sum of its proper divisors (31253612).

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

23440188 is a wasteful number, since it uses less digits than its factorization.

23440188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1953356 (or 1953354 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 30.

The square root of 23440188 is about 4841.5067902462. The cubic root of 23440188 is about 286.1895006357.

The spelling of 23440188 in words is "twenty-three million, four hundred forty thousand, one hundred eighty-eight".