52640420 has 24 divisors (see below), whose sum is σ = 126337344. Its totient is φ = 18048096.

The previous prime is 52640417. The next prime is 52640437. The reversal of 52640420 is 2404625.

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, 187862 + ... + 188141.

It is an arithmetic number, because the mean of its divisors is an integer number (5264056).

Almost surely, 2^52640420 is an apocalyptic number.

It is an amenable number.

52640420 is an abundant number, since it is smaller than the sum of its proper divisors (73696924).

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

52640420 is a wasteful number, since it uses less digits than its factorization.

52640420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376019 (or 376017 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 52640420 is about 7255.3718030160. The cubic root of 52640420 is about 374.7771594570. Note that the first 3 decimals are identical.

The spelling of 52640420 in words is "fifty-two million, six hundred forty thousand, four hundred twenty".