378643508 has 12 divisors (see below), whose sum is σ = 662773860. Its totient is φ = 189279552.

The previous prime is 378643471. The next prime is 378643511. The reversal of 378643508 is 805346873.

It can be written as a sum of positive squares in 2 ways, for example, as 7772944 + 370870564 = 2788^2 + 19258^2 .

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

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, 18560 + ... + 33192.

It is an arithmetic number, because the mean of its divisors is an integer number (55231155).

Almost surely, 2^378643508 is an apocalyptic number.

It is an amenable number.

378643508 is a deficient number, since it is larger than the sum of its proper divisors (284130352).

378643508 is a wasteful number, since it uses less digits than its factorization.

378643508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21106 (or 21104 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 44.

The square root of 378643508 is about 19458.7642978685. The cubic root of 378643508 is about 723.4527497680.

The spelling of 378643508 in words is "three hundred seventy-eight million, six hundred forty-three thousand, five hundred eight".