538972668 has 36 divisors (see below), whose sum is σ = 1467204648. Its totient is φ = 165837600.

The previous prime is 538972661. The next prime is 538972669. The reversal of 538972668 is 866279835.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (538972661) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 575358 + ... + 576293.

Almost surely, 2^538972668 is an apocalyptic number.

It is an amenable number.

538972668 is an abundant number, since it is smaller than the sum of its proper divisors (928231980).

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

538972668 is a wasteful number, since it uses less digits than its factorization.

538972668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1151674 (or 1151669 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 54.

The square root of 538972668 is about 23215.7848887346. The cubic root of 538972668 is about 813.8085482448.

It can be divided in two parts, 53897 and 2668, that added together give a palindrome (56565).

The spelling of 538972668 in words is "five hundred thirty-eight million, nine hundred seventy-two thousand, six hundred sixty-eight".