23662140 has 24 divisors (see below), whose sum is σ = 66254160. Its totient is φ = 6309888.

The previous prime is 23662139. The next prime is 23662157. The reversal of 23662140 is 4126632.

It is a self number, because there is not a number n which added to its sum of digits gives 23662140.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 197125 + ... + 197244.

It is an arithmetic number, because the mean of its divisors is an integer number (2760590).

Almost surely, 2^23662140 is an apocalyptic number.

23662140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23662140 is an abundant number, since it is smaller than the sum of its proper divisors (42592020).

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

23662140 is a wasteful number, since it uses less digits than its factorization.

23662140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394381 (or 394379 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 23662140 is about 4864.3745743929. The cubic root of 23662140 is about 287.0899611553.

Adding to 23662140 its reverse (4126632), we get a palindrome (27788772).

The spelling of 23662140 in words is "twenty-three million, six hundred sixty-two thousand, one hundred forty".