53439972 has 12 divisors (see below), whose sum is σ = 124693296. Its totient is φ = 17813320.

The previous prime is 53439941. The next prime is 53439979. The reversal of 53439972 is 27993435.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (53439979) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2226654 + ... + 2226677.

It is an arithmetic number, because the mean of its divisors is an integer number (10391108).

Almost surely, 2^53439972 is an apocalyptic number.

It is an amenable number.

53439972 is an abundant number, since it is smaller than the sum of its proper divisors (71253324).

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

53439972 is a wasteful number, since it uses less digits than its factorization.

53439972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4453338 (or 4453336 counting only the distinct ones).

The product of its digits is 204120, while the sum is 42.

The square root of 53439972 is about 7310.2648378838. The cubic root of 53439972 is about 376.6651215989.

The spelling of 53439972 in words is "fifty-three million, four hundred thirty-nine thousand, nine hundred seventy-two".