388566738 has 48 divisors (see below), whose sum is σ = 1004006016. Its totient is φ = 106191360.

The previous prime is 388566733. The next prime is 388566811. The reversal of 388566738 is 837665883.

It is a happy number.

388566738 is a `hidden beast` number, since 3 + 8 + 8 + 566 + 73 + 8 = 666.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (388566733) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 64143 + ... + 69938.

It is an arithmetic number, because the mean of its divisors is an integer number (20916792).

Almost surely, 2^388566738 is an apocalyptic number.

388566738 is an abundant number, since it is smaller than the sum of its proper divisors (615439278).

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

388566738 is a wasteful number, since it uses less digits than its factorization.

388566738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134119 (or 134116 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 54.

The square root of 388566738 is about 19712.0962355605. The cubic root of 388566738 is about 729.7182486845.

The spelling of 388566738 in words is "three hundred eighty-eight million, five hundred sixty-six thousand, seven hundred thirty-eight".