52831440 has 200 divisors, whose sum is σ = 190130688. Its totient is φ = 13582080.

The previous prime is 52831439. The next prime is 52831453. The reversal of 52831440 is 4413825.

It is a super-2 number, since 2×52831440² = 5582322104947200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 200749 + ... + 201011.

Almost surely, 2^52831440 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 52831440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95065344).

52831440 is an abundant number, since it is smaller than the sum of its proper divisors (137299248).

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

52831440 is a wasteful number, since it uses less digits than its factorization.

52831440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319 (or 304 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 52831440 is about 7268.5239216776. The cubic root of 52831440 is about 375.2299389794.

The spelling of 52831440 in words is "fifty-two million, eight hundred thirty-one thousand, four hundred forty".