538666764 has 24 divisors (see below), whose sum is σ = 1300230960. Its totient is φ = 173363904.

The previous prime is 538666759. The next prime is 538666769. The reversal of 538666764 is 467666835.

It is an interprime number because it is at equal distance from previous prime (538666759) and next prime (538666769).

It is not an unprimeable number, because it can be changed into a prime (538666769) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 773599 + ... + 774294.

It is an arithmetic number, because the mean of its divisors is an integer number (54176290).

Almost surely, 2^538666764 is an apocalyptic number.

It is an amenable number.

538666764 is an abundant number, since it is smaller than the sum of its proper divisors (761564196).

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

538666764 is a wasteful number, since it uses less digits than its factorization.

538666764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1547929 (or 1547927 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 51.

The square root of 538666764 is about 23209.1956775757. The cubic root of 538666764 is about 813.6545550290.

The spelling of 538666764 in words is "five hundred thirty-eight million, six hundred sixty-six thousand, seven hundred sixty-four".