52523640 has 320 divisors, whose sum is σ = 201247200. Its totient is φ = 12192768.

The previous prime is 52523633. The next prime is 52523711. The reversal of 52523640 is 4632525.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1221459 + ... + 1221501.

Almost surely, 2^52523640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 52523640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100623600).

52523640 is an abundant number, since it is smaller than the sum of its proper divisors (148723560).

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

52523640 is a wasteful number, since it uses less digits than its factorization.

52523640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108 (or 95 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 52523640 is about 7247.3195044789. The cubic root of 52523640 is about 374.4998131316.

The spelling of 52523640 in words is "fifty-two million, five hundred twenty-three thousand, six hundred forty".