52787440 has 20 divisors (see below), whose sum is σ = 122730984. Its totient is φ = 21114944.

The previous prime is 52787429. The next prime is 52787467. The reversal of 52787440 is 4478725.

52787440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 52787440.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 329842 + ... + 330001.

Almost surely, 2^52787440 is an apocalyptic number.

It is an amenable number.

52787440 is an abundant number, since it is smaller than the sum of its proper divisors (69943544).

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

52787440 is a wasteful number, since it uses less digits than its factorization.

52787440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 659856 (or 659850 counting only the distinct ones).

The product of its (nonzero) digits is 62720, while the sum is 37.

The square root of 52787440 is about 7265.4965418752. The cubic root of 52787440 is about 375.1257415365.

The spelling of 52787440 in words is "fifty-two million, seven hundred eighty-seven thousand, four hundred forty".