378656775 has 60 divisors (see below), whose sum is σ = 801633712. Its totient is φ = 173093760.

The previous prime is 378656713. The next prime is 378656783. The reversal of 378656775 is 577656873.

378656775 is a `hidden beast` number, since 3 + 7 + 8 + 6 + 567 + 75 = 666.

It is not a de Polignac number, because 378656775 - 2⁸ = 378656519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 819 + ... + 27531.

Almost surely, 2^378656775 is an apocalyptic number.

378656775 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

378656775 is an abundant number, since it is smaller than the sum of its proper divisors (422976937).

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

378656775 is a wasteful number, since it uses less digits than its factorization.

378656775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26742 (or 26728 counting only the distinct ones).

The product of its digits is 7408800, while the sum is 54.

The square root of 378656775 is about 19459.1051952550. The cubic root of 378656775 is about 723.4611991717.

The spelling of 378656775 in words is "three hundred seventy-eight million, six hundred fifty-six thousand, seven hundred seventy-five".