52566390 has 96 divisors (see below), whose sum is σ = 143410176. Its totient is φ = 13343040.

The previous prime is 52566383. The next prime is 52566403. The reversal of 52566390 is 9366525.

52566390 is a `hidden beast` number, since 5 + 2 + 566 + 3 + 90 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 231457 + ... + 231683.

It is an arithmetic number, because the mean of its divisors is an integer number (1493856).

Almost surely, 2^52566390 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 52566390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71705088).

52566390 is an abundant number, since it is smaller than the sum of its proper divisors (90843786).

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

52566390 is a wasteful number, since it uses less digits than its factorization.

52566390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354 (or 351 counting only the distinct ones).

The product of its (nonzero) digits is 48600, while the sum is 36.

The square root of 52566390 is about 7250.2682708987. The cubic root of 52566390 is about 374.6013897765.

The spelling of 52566390 in words is "fifty-two million, five hundred sixty-six thousand, three hundred ninety".