52639860 has 192 divisors, whose sum is σ = 187858944. Its totient is φ = 10713600.

The previous prime is 52639831. The next prime is 52639877. The reversal of 52639860 is 6893625.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 169105 + ... + 169415.

It is an arithmetic number, because the mean of its divisors is an integer number (978432).

Almost surely, 2^52639860 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 52639860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93929472).

52639860 is an abundant number, since it is smaller than the sum of its proper divisors (135219084).

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

52639860 is a wasteful number, since it uses less digits than its factorization.

52639860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374 (or 372 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 39.

The square root of 52639860 is about 7255.3332108181. Note that the first 3 decimals coincide. The cubic root of 52639860 is about 374.7758304659.

The spelling of 52639860 in words is "fifty-two million, six hundred thirty-nine thousand, eight hundred sixty".