378991312 has 40 divisors (see below), whose sum is σ = 840390656. Its totient is φ = 162193536.

The previous prime is 378991307. The next prime is 378991339. The reversal of 378991312 is 213199873.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93553 + ... + 97519.

Almost surely, 2^378991312 is an apocalyptic number.

It is an amenable number.

378991312 is an abundant number, since it is smaller than the sum of its proper divisors (461399344).

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

378991312 is a wasteful number, since it uses less digits than its factorization.

378991312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4835 (or 4829 counting only the distinct ones).

The product of its digits is 81648, while the sum is 43.

The square root of 378991312 is about 19467.6991963611. The cubic root of 378991312 is about 723.6741917948.

The spelling of 378991312 in words is "three hundred seventy-eight million, nine hundred ninety-one thousand, three hundred twelve".