388457969 has 8 divisors (see below), whose sum is σ = 395341632. Its totient is φ = 381613680.

The previous prime is 388457941. The next prime is 388457977. The reversal of 388457969 is 969754883.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-388457969 is a prime.

It is a super-2 number, since 2×388457969² = 301799187359209922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (388457989) 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 7 ways as a sum of consecutive naturals, for example, 10427 + ... + 29759.

It is an arithmetic number, because the mean of its divisors is an integer number (49417704).

Almost surely, 2^388457969 is an apocalyptic number.

It is an amenable number.

388457969 is a deficient number, since it is larger than the sum of its proper divisors (6883663).

388457969 is a wasteful number, since it uses less digits than its factorization.

388457969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19687.

The product of its digits is 13063680, while the sum is 59.

The square root of 388457969 is about 19709.3371019931. The cubic root of 388457969 is about 729.6501538773.

The spelling of 388457969 in words is "three hundred eighty-eight million, four hundred fifty-seven thousand, nine hundred sixty-nine".