52564428 has 36 divisors (see below), whose sum is σ = 151853520. Its totient is φ = 15018336.

The previous prime is 52564427. The next prime is 52564429. The reversal of 52564428 is 82446525.

It is a happy number.

52564428 is a `hidden beast` number, since 5 + 2 + 5 + 644 + 2 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (52564427) and next prime (52564429).

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 52564392 and 52564401.

It is not an unprimeable number, because it can be changed into a prime (52564423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 104043 + ... + 104546.

Almost surely, 2^52564428 is an apocalyptic number.

It is an amenable number.

52564428 is an abundant number, since it is smaller than the sum of its proper divisors (99289092).

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

52564428 is a wasteful number, since it uses less digits than its factorization.

52564428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208606 (or 208601 counting only the distinct ones).

The product of its digits is 76800, while the sum is 36.

The square root of 52564428 is about 7250.1329642980. The cubic root of 52564428 is about 374.5967291491.

The spelling of 52564428 in words is "fifty-two million, five hundred sixty-four thousand, four hundred twenty-eight".