53399520 has 192 divisors, whose sum is σ = 191600640. Its totient is φ = 13883904.

The previous prime is 53399501. The next prime is 53399551. The reversal of 53399520 is 2599335.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 202909 + ... + 203171.

It is an arithmetic number, because the mean of its divisors is an integer number (997920).

Almost surely, 2^53399520 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 53399520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95800320).

53399520 is an abundant number, since it is smaller than the sum of its proper divisors (138201120).

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

53399520 is a wasteful number, since it uses less digits than its factorization.

53399520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334 (or 320 counting only the distinct ones).

The product of its (nonzero) digits is 36450, while the sum is 36.

The square root of 53399520 is about 7307.4975196711. The cubic root of 53399520 is about 376.5700572796.

The spelling of 53399520 in words is "fifty-three million, three hundred ninety-nine thousand, five hundred twenty".