388770816 has 176 divisors, whose sum is σ = 1202653440. Its totient is φ = 109363200.

The previous prime is 388770797. The next prime is 388770857. The reversal of 388770816 is 618077883.

It is a super-2 number, since 2×388770816² = 302285494746611712, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2171815 + ... + 2171993.

Almost surely, 2^388770816 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 388770816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (601326720).

388770816 is an abundant number, since it is smaller than the sum of its proper divisors (813882624).

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

388770816 is a wasteful number, since it uses less digits than its factorization.

388770816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310 (or 292 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 48.

The square root of 388770816 is about 19717.2720222651. The cubic root of 388770816 is about 729.8459773881.

The spelling of 388770816 in words is "three hundred eighty-eight million, seven hundred seventy thousand, eight hundred sixteen".