378919915 has 8 divisors (see below), whose sum is σ = 496040688. Its totient is φ = 275578080.

The previous prime is 378919897. The next prime is 378919951. The reversal of 378919915 is 519919873.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 378919915 - 2²⁷ = 244702187 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3444672 + ... + 3444781.

It is an arithmetic number, because the mean of its divisors is an integer number (62005086).

Almost surely, 2^378919915 is an apocalyptic number.

378919915 is a deficient number, since it is larger than the sum of its proper divisors (117120773).

378919915 is a wasteful number, since it uses less digits than its factorization.

378919915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6889469.

The product of its digits is 612360, while the sum is 52.

The square root of 378919915 is about 19465.8653801982. The cubic root of 378919915 is about 723.6287453606.

The spelling of 378919915 in words is "three hundred seventy-eight million, nine hundred nineteen thousand, nine hundred fifteen".