388742992 has 30 divisors (see below), whose sum is σ = 827890154. Its totient is φ = 176700480.

The previous prime is 388742989. The next prime is 388742993. The reversal of 388742992 is 299247883.

It can be written as a sum of positive squares in only one way, i.e., 351337536 + 37405456 = 18744^2 + 6116^2 .

It is a super-2 number, since 2×388742992² = 302242227658224128, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388742993) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 98463 + ... + 102334.

Almost surely, 2^388742992 is an apocalyptic number.

It is an amenable number.

388742992 is an abundant number, since it is smaller than the sum of its proper divisors (439147162).

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

388742992 is a wasteful number, since it uses less digits than its factorization.

388742992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200827 (or 200810 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 52.

The square root of 388742992 is about 19716.5664353609. The cubic root of 388742992 is about 729.8285654853.

The spelling of 388742992 in words is "three hundred eighty-eight million, seven hundred forty-two thousand, nine hundred ninety-two".