378640404 has 18 divisors (see below), whose sum is σ = 957118890. Its totient is φ = 126213456.

The previous prime is 378640391. The next prime is 378640411. The reversal of 378640404 is 404046873.

378640404 is a `hidden beast` number, since 3 + 7 + 8 + 640 + 4 + 0 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 378380304 + 260100 = 19452^2 + 510^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 10517789 = 378640404 / (3 + 7 + 8 + 6 + 4 + 0 + 4 + 0 + 4).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5258859 + ... + 5258930.

Almost surely, 2^378640404 is an apocalyptic number.

It is an amenable number.

378640404 is an abundant number, since it is smaller than the sum of its proper divisors (578478486).

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

378640404 is a wasteful number, since it uses less digits than its factorization.

378640404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10517799 (or 10517794 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 36.

The square root of 378640404 is about 19458.6845393002. The cubic root of 378640404 is about 723.4507728835.

The spelling of 378640404 in words is "three hundred seventy-eight million, six hundred forty thousand, four hundred four".