378808815 has 64 divisors (see below), whose sum is σ = 760826880. Its totient is φ = 156349440.

The previous prime is 378808813. The next prime is 378808819. The reversal of 378808815 is 518808873.

It is not a de Polignac number, because 378808815 - 2¹ = 378808813 is a prime.

It is a super-2 number, since 2×378808815² = 286992236643408450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (378808813) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 180291 + ... + 182379.

It is an arithmetic number, because the mean of its divisors is an integer number (11887920).

Almost surely, 2^378808815 is an apocalyptic number.

378808815 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

378808815 is an abundant number, since it is smaller than the sum of its proper divisors (382018065).

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

378808815 is a wasteful number, since it uses less digits than its factorization.

378808815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2272.

The product of its (nonzero) digits is 430080, while the sum is 48.

The square root of 378808815 is about 19463.0114576342. The cubic root of 378808815 is about 723.5580153646.

The spelling of 378808815 in words is "three hundred seventy-eight million, eight hundred eight thousand, eight hundred fifteen".