53402388 has 96 divisors (see below), whose sum is σ = 144883200. Its totient is φ = 15168384.

The previous prime is 53402381. The next prime is 53402411. The reversal of 53402388 is 88320435.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53402381) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 127243 + ... + 127661.

It is an arithmetic number, because the mean of its divisors is an integer number (1509200).

Almost surely, 2^53402388 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 53402388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72441600).

53402388 is an abundant number, since it is smaller than the sum of its proper divisors (91480812).

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

53402388 is a wasteful number, since it uses less digits than its factorization.

53402388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501 (or 499 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 53402388 is about 7307.6937538460. The cubic root of 53402388 is about 376.5767988108.

The spelling of 53402388 in words is "fifty-three million, four hundred two thousand, three hundred eighty-eight".