388522930 has 24 divisors (see below), whose sum is σ = 742904388. Its totient is φ = 146266368.

The previous prime is 388522921. The next prime is 388522933. The reversal of 388522930 is 39225883.

It can be written as a sum of positive squares in 6 ways, for example, as 311487201 + 77035729 = 17649^2 + 8777^2 .

It is not an unprimeable number, because it can be changed into a prime (388522933) 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, 64329 + ... + 70108.

Almost surely, 2^388522930 is an apocalyptic number.

388522930 is a deficient number, since it is larger than the sum of its proper divisors (354381458).

388522930 is a wasteful number, since it uses less digits than its factorization.

388522930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134478 (or 134461 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 388522930 is about 19710.9850083653. The cubic root of 388522930 is about 729.6908242248.

The spelling of 388522930 in words is "three hundred eighty-eight million, five hundred twenty-two thousand, nine hundred thirty".