388724394 has 16 divisors (see below), whose sum is σ = 783571968. Its totient is φ = 128554272.

The previous prime is 388724389. The next prime is 388724417. The reversal of 388724394 is 493427883.

It is a super-2 number, since 2×388724394² = 302213308981334472, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 254307 + ... + 255830.

It is an arithmetic number, because the mean of its divisors is an integer number (48973248).

Almost surely, 2^388724394 is an apocalyptic number.

388724394 is an abundant number, since it is smaller than the sum of its proper divisors (394847574).

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

388724394 is a wasteful number, since it uses less digits than its factorization.

388724394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510269.

The product of its digits is 1161216, while the sum is 48.

The square root of 388724394 is about 19716.0947958768. The cubic root of 388724394 is about 729.8169266319.

The spelling of 388724394 in words is "three hundred eighty-eight million, seven hundred twenty-four thousand, three hundred ninety-four".