23427640 has 16 divisors (see below), whose sum is σ = 52712280. Its totient is φ = 9371040.

The previous prime is 23427629. The next prime is 23427641. The reversal of 23427640 is 4672432.

It is a junction number, because it is equal to n+sod(n) for n = 23427599 and 23427608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23427641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 292806 + ... + 292885.

Almost surely, 2^23427640 is an apocalyptic number.

23427640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23427640 is an abundant number, since it is smaller than the sum of its proper divisors (29284640).

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

23427640 is a wasteful number, since it uses less digits than its factorization.

23427640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 585702 (or 585698 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 28.

The square root of 23427640 is about 4840.2107392137. The cubic root of 23427640 is about 286.1384238718.

The spelling of 23427640 in words is "twenty-three million, four hundred twenty-seven thousand, six hundred forty".