52415640 has 64 divisors (see below), whose sum is σ = 174722400. Its totient is φ = 13977216.

The previous prime is 52415639. The next prime is 52415647. The reversal of 52415640 is 4651425.

52415640 is a `hidden beast` number, since 5 + 2 + 4 + 15 + 640 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52415647) 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, 23187 + ... + 25346.

Almost surely, 2^52415640 is an apocalyptic number.

It is an amenable number.

52415640 is an abundant number, since it is smaller than the sum of its proper divisors (122306760).

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

52415640 is a wasteful number, since it uses less digits than its factorization.

52415640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48553 (or 48543 counting only the distinct ones).

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

The square root of 52415640 is about 7239.8646396186. The cubic root of 52415640 is about 374.2429527068.

The spelling of 52415640 in words is "fifty-two million, four hundred fifteen thousand, six hundred forty".