52640920 has 32 divisors (see below), whose sum is σ = 118681200. Its totient is φ = 21013888.

The previous prime is 52640881. The next prime is 52640927. The reversal of 52640920 is 2904625.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52640927) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25362 + ... + 27358.

Almost surely, 2^52640920 is an apocalyptic number.

It is an amenable number.

52640920 is an abundant number, since it is smaller than the sum of its proper divisors (66040280).

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

52640920 is a wasteful number, since it uses less digits than its factorization.

52640920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2667 (or 2663 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 52640920 is about 7255.4062601621. The cubic root of 52640920 is about 374.7783460483.

The spelling of 52640920 in words is "fifty-two million, six hundred forty thousand, nine hundred twenty".