538657938 has 160 divisors (see below), whose sum is σ = 1512403200. Its totient is φ = 139501440.

The previous prime is 538657913. The next prime is 538657949. The reversal of 538657938 is 839756835.

It is a happy number.

538657938 is a `hidden beast` number, since 5 + 38 + 6 + 579 + 38 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 898963 + ... + 899561.

It is an arithmetic number, because the mean of its divisors is an integer number (9452520).

Almost surely, 2^538657938 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 538657938, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (756201600).

538657938 is an abundant number, since it is smaller than the sum of its proper divisors (973745262).

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

538657938 is a wasteful number, since it uses less digits than its factorization.

538657938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 694 (or 685 counting only the distinct ones).

The product of its digits is 5443200, while the sum is 54.

The square root of 538657938 is about 23209.0055366446. The cubic root of 538657938 is about 813.6501111224.

The spelling of 538657938 in words is "five hundred thirty-eight million, six hundred fifty-seven thousand, nine hundred thirty-eight".