52390944 has 36 divisors (see below), whose sum is σ = 148987566. Its totient is φ = 17463552.

The previous prime is 52390939. The next prime is 52390969. The reversal of 52390944 is 44909325.

52390944 is a `hidden beast` number, since 523 + 90 + 9 + 44 = 666.

It can be written as a sum of positive squares in only one way, i.e., 50979600 + 1411344 = 7140^2 + 1188^2 .

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

It is a super-2 number, since 2×52390944² = 5489622026422272, which contains 22 as substring.

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 = 52390899 and 52390908.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 90669 + ... + 91244.

Almost surely, 2^52390944 is an apocalyptic number.

It is an amenable number.

52390944 is an abundant number, since it is smaller than the sum of its proper divisors (96596622).

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

52390944 is a wasteful number, since it uses less digits than its factorization.

52390944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181929 (or 181918 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 52390944 is about 7238.1588819257. The cubic root of 52390944 is about 374.1841677344.

The spelling of 52390944 in words is "fifty-two million, three hundred ninety thousand, nine hundred forty-four".