53397760 has 72 divisors (see below), whose sum is σ = 137786040. Its totient is φ = 19709952.

The previous prime is 53397737. The next prime is 53397761. The reversal of 53397760 is 6779335.

It can be written as a sum of positive squares in 4 ways, for example, as 1327104 + 52070656 = 1152^2 + 7216^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (53397761) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15036 + ... + 18244.

It is an arithmetic number, because the mean of its divisors is an integer number (1913695).

Almost surely, 2^53397760 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 53397760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68893020).

53397760 is an abundant number, since it is smaller than the sum of its proper divisors (84388280).

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

53397760 is a wasteful number, since it uses less digits than its factorization.

53397760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3243 (or 3229 counting only the distinct ones).

The product of its (nonzero) digits is 119070, while the sum is 40.

The square root of 53397760 is about 7307.3770944163. The cubic root of 53397760 is about 376.5659200977.

The spelling of 53397760 in words is "fifty-three million, three hundred ninety-seven thousand, seven hundred sixty".