23655440 has 20 divisors (see below), whose sum is σ = 54999084. Its totient is φ = 9462144.

The previous prime is 23655439. The next prime is 23655451. The reversal of 23655440 is 4455632.

It can be written as a sum of positive squares in 2 ways, for example, as 2458624 + 21196816 = 1568^2 + 4604^2 .

It is a tau number, because it is divible by the number of its divisors (20).

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, 147767 + ... + 147926.

Almost surely, 2^23655440 is an apocalyptic number.

23655440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23655440 is an abundant number, since it is smaller than the sum of its proper divisors (31343644).

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

23655440 is a wasteful number, since it uses less digits than its factorization.

23655440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295706 (or 295700 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 29.

The square root of 23655440 is about 4863.6858451179. The cubic root of 23655440 is about 287.0628618267.

The spelling of 23655440 in words is "twenty-three million, six hundred fifty-five thousand, four hundred forty".