388775930 has 8 divisors (see below), whose sum is σ = 699796692. Its totient is φ = 155510368.

The previous prime is 388775917. The next prime is 388775953. The reversal of 388775930 is 39577883.

It can be written as a sum of positive squares in 2 ways, for example, as 358382761 + 30393169 = 18931^2 + 5513^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×388775930² = 302293447494729800, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19438787 + ... + 19438806.

Almost surely, 2^388775930 is an apocalyptic number.

388775930 is a deficient number, since it is larger than the sum of its proper divisors (311020762).

388775930 is a wasteful number, since it uses less digits than its factorization.

388775930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38877600.

The product of its (nonzero) digits is 1270080, while the sum is 50.

The square root of 388775930 is about 19717.4017050929. The cubic root of 388775930 is about 729.8491775734.

The spelling of 388775930 in words is "three hundred eighty-eight million, seven hundred seventy-five thousand, nine hundred thirty".