388704440 has 16 divisors (see below), whose sum is σ = 874585080. Its totient is φ = 155481760.

The previous prime is 388704409. The next prime is 388704461. The reversal of 388704440 is 44407883.

It is a super-2 number, since 2×388704440² = 302182283351427200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 388704394 and 388704403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4858766 + ... + 4858845.

Almost surely, 2^388704440 is an apocalyptic number.

It is an amenable number.

388704440 is an abundant number, since it is smaller than the sum of its proper divisors (485880640).

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

388704440 is a wasteful number, since it uses less digits than its factorization.

388704440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9717622 (or 9717618 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 38.

The square root of 388704440 is about 19715.5887561087. The cubic root of 388704440 is about 729.8044387644.

The spelling of 388704440 in words is "three hundred eighty-eight million, seven hundred four thousand, four hundred forty".