52991740 has 12 divisors (see below), whose sum is σ = 111282696. Its totient is φ = 21196688.

The previous prime is 52991717. The next prime is 52991759. The reversal of 52991740 is 4719925.

It is a self number, because there is not a number n which added to its sum of digits gives 52991740.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1324774 + ... + 1324813.

It is an arithmetic number, because the mean of its divisors is an integer number (9273558).

Almost surely, 2^52991740 is an apocalyptic number.

It is an amenable number.

52991740 is an abundant number, since it is smaller than the sum of its proper divisors (58290956).

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

52991740 is a wasteful number, since it uses less digits than its factorization.

52991740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2649596 (or 2649594 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 52991740 is about 7279.5425680464. The cubic root of 52991740 is about 375.6090606219.

The spelling of 52991740 in words is "fifty-two million, nine hundred ninety-one thousand, seven hundred forty".