53621280 has 144 divisors (see below), whose sum is σ = 191056320. Its totient is φ = 13668864.

The previous prime is 53621221. The next prime is 53621297. The reversal of 53621280 is 8212635.

53621280 is a `hidden beast` number, since 536 + 2 + 128 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32311 + ... + 33929.

It is an arithmetic number, because the mean of its divisors is an integer number (1326780).

Almost surely, 2^53621280 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 53621280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95528160).

53621280 is an abundant number, since it is smaller than the sum of its proper divisors (137435040).

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

53621280 is a wasteful number, since it uses less digits than its factorization.

53621280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1663 (or 1652 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 53621280 is about 7322.6552561212. The cubic root of 53621280 is about 377.0906165343.

The spelling of 53621280 in words is "fifty-three million, six hundred twenty-one thousand, two hundred eighty".