388820478 has 8 divisors (see below), whose sum is σ = 777640968. Its totient is φ = 129606824.

The previous prime is 388820459. The next prime is 388820479. The reversal of 388820478 is 874028883.

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

388820478 is an admirable number.

It is a super-2 number, since 2×388820478² = 302362728224296968, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388820479) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32401701 + ... + 32401712.

It is an arithmetic number, because the mean of its divisors is an integer number (97205121).

Almost surely, 2^388820478 is an apocalyptic number.

388820478 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

388820478 is a wasteful number, since it uses less digits than its factorization.

388820478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64803418.

The product of its (nonzero) digits is 688128, while the sum is 48.

The square root of 388820478 is about 19718.5313347622. The cubic root of 388820478 is about 729.8770531669.

The spelling of 388820478 in words is "three hundred eighty-eight million, eight hundred twenty thousand, four hundred seventy-eight".