378991392 has 48 divisors (see below), whose sum is σ = 1071383040. Its totient is φ = 116612352.

The previous prime is 378991391. The next prime is 378991433. The reversal of 378991392 is 293199873.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is not an unprimeable number, because it can be changed into a prime (378991391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150592 + ... + 153087.

It is an arithmetic number, because the mean of its divisors is an integer number (22320480).

Almost surely, 2^378991392 is an apocalyptic number.

378991392 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

378991392 is an abundant number, since it is smaller than the sum of its proper divisors (692391648).

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

378991392 is a wasteful number, since it uses less digits than its factorization.

378991392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303705 (or 303697 counting only the distinct ones).

The product of its digits is 734832, while the sum is 51.

The square root of 378991392 is about 19467.7012510466. The cubic root of 378991392 is about 723.6742427141.

The spelling of 378991392 in words is "three hundred seventy-eight million, nine hundred ninety-one thousand, three hundred ninety-two".