538618872 has 128 divisors (see below), whose sum is σ = 1521192960. Its totient is φ = 157518720.

The previous prime is 538618867. The next prime is 538618889. The reversal of 538618872 is 278816835.

It is a super-2 number, since 2×538618872² = 580220578549104768, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1029603 + ... + 1030125.

It is an arithmetic number, because the mean of its divisors is an integer number (11884320).

Almost surely, 2^538618872 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 538618872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (760596480).

538618872 is an abundant number, since it is smaller than the sum of its proper divisors (982574088).

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

538618872 is a wasteful number, since it uses less digits than its factorization.

538618872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 673 (or 669 counting only the distinct ones).

The product of its digits is 645120, while the sum is 48.

The square root of 538618872 is about 23208.1639084181. The cubic root of 538618872 is about 813.6304407395.

The spelling of 538618872 in words is "five hundred thirty-eight million, six hundred eighteen thousand, eight hundred seventy-two".