52615440 has 80 divisors (see below), whose sum is σ = 181238400. Its totient is φ = 14030208.

The previous prime is 52615417. The next prime is 52615441. The reversal of 52615440 is 4451625.

52615440 is a `hidden beast` number, since 5 + 2 + 615 + 4 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (52615441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10020 + ... + 14339.

It is an arithmetic number, because the mean of its divisors is an integer number (2265480).

Almost surely, 2^52615440 is an apocalyptic number.

It is an amenable number.

52615440 is an abundant number, since it is smaller than the sum of its proper divisors (128622960).

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

52615440 is a wasteful number, since it uses less digits than its factorization.

52615440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24381 (or 24369 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 52615440 is about 7253.6501156314. The cubic root of 52615440 is about 374.7178677903.

It can be divided in two parts, 5261 and 5440, that added together give a palindrome (10701).

The spelling of 52615440 in words is "fifty-two million, six hundred fifteen thousand, four hundred forty".