388880469 has 12 divisors (see below), whose sum is σ = 567508396. Its totient is φ = 256580352.

The previous prime is 388880413. The next prime is 388880473. The reversal of 388880469 is 964088883.

It can be written as a sum of positive squares in 2 ways, for example, as 255200625 + 133679844 = 15975^2 + 11562^2 .

It is not a de Polignac number, because 388880469 - 2¹² = 388876373 is a prime.

It is a super-2 number, since 2×388880469² = 302456038339319922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388880489) 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, 221854 + ... + 223599.

Almost surely, 2^388880469 is an apocalyptic number.

It is an amenable number.

388880469 is a deficient number, since it is larger than the sum of its proper divisors (178627927).

388880469 is a wasteful number, since it uses less digits than its factorization.

388880469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 445556 (or 445553 counting only the distinct ones).

The product of its (nonzero) digits is 2654208, while the sum is 54.

The square root of 388880469 is about 19720.0524593623. The cubic root of 388880469 is about 729.9145887436.

The spelling of 388880469 in words is "three hundred eighty-eight million, eight hundred eighty thousand, four hundred sixty-nine".