378791664 has 20 divisors (see below), whose sum is σ = 978545256. Its totient is φ = 126263872.

The previous prime is 378791629. The next prime is 378791731. The reversal of 378791664 is 466197873.

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, 3945699 + ... + 3945794.

Almost surely, 2^378791664 is an apocalyptic number.

It is an amenable number.

378791664 is an abundant number, since it is smaller than the sum of its proper divisors (599753592).

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

378791664 is a wasteful number, since it uses less digits than its factorization.

378791664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7891504 (or 7891498 counting only the distinct ones).

The product of its digits is 1524096, while the sum is 51.

The square root of 378791664 is about 19462.5708476553. The cubic root of 378791664 is about 723.5470952290.

The spelling of 378791664 in words is "three hundred seventy-eight million, seven hundred ninety-one thousand, six hundred sixty-four".