23899840 has 28 divisors (see below), whose sum is σ = 56912256. Its totient is φ = 9559808.

The previous prime is 23899823. The next prime is 23899847. The reversal of 23899840 is 4899832.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (23899847) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37024 + ... + 37663.

Almost surely, 2^23899840 is an apocalyptic number.

23899840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23899840 is an abundant number, since it is smaller than the sum of its proper divisors (33012416).

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

23899840 is an equidigital number, since it uses as much as digits as its factorization.

23899840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74704 (or 74694 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 43.

The square root of 23899840 is about 4888.7462605457. The cubic root of 23899840 is about 288.0480886778.

The spelling of 23899840 in words is "twenty-three million, eight hundred ninety-nine thousand, eight hundred forty".