378993564 has 36 divisors (see below), whose sum is σ = 959346024. Its totient is φ = 126155232.

The previous prime is 378993539. The next prime is 378993581. The reversal of 378993564 is 465399873.

378993564 is a `hidden beast` number, since 3 + 78 + 9 + 9 + 3 + 564 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×378993564² = 287272243106844192, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 378993564.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20299 + ... + 34205.

Almost surely, 2^378993564 is an apocalyptic number.

It is an amenable number.

378993564 is an abundant number, since it is smaller than the sum of its proper divisors (580352460).

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

378993564 is a wasteful number, since it uses less digits than its factorization.

378993564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14674 (or 14669 counting only the distinct ones).

The product of its digits is 4898880, while the sum is 54.

The square root of 378993564 is about 19467.7570356731. The cubic root of 378993564 is about 723.6756251707.

The spelling of 378993564 in words is "three hundred seventy-eight million, nine hundred ninety-three thousand, five hundred sixty-four".