23178240 has 132 divisors (see below), whose sum is σ = 80471664. Its totient is φ = 6168576.

The previous prime is 23178217. The next prime is 23178251. The reversal of 23178240 is 4287132.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45829 + ... + 46331.

Almost surely, 2^23178240 is an apocalyptic number.

23178240 is a gapful number since it is divisible by the number (20) 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 23178240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40235832).

23178240 is an abundant number, since it is smaller than the sum of its proper divisors (57293424).

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

23178240 is a wasteful number, since it uses less digits than its factorization.

23178240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534 (or 513 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 23178240 is about 4814.3784645580. The cubic root of 23178240 is about 285.1194328610.

The spelling of 23178240 in words is "twenty-three million, one hundred seventy-eight thousand, two hundred forty".