53638520 has 128 divisors (see below), whose sum is σ = 140616000. Its totient is φ = 18247680.

The previous prime is 53638499. The next prime is 53638561. The reversal of 53638520 is 2583635.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 602636 + ... + 602724.

Almost surely, 2^53638520 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 53638520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70308000).

53638520 is an abundant number, since it is smaller than the sum of its proper divisors (86977480).

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

53638520 is a wasteful number, since it uses less digits than its factorization.

53638520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193 (or 189 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 53638520 is about 7323.8323301397. The cubic root of 53638520 is about 377.1310255263.

The spelling of 53638520 in words is "fifty-three million, six hundred thirty-eight thousand, five hundred twenty".