378869640 has 64 divisors (see below), whose sum is σ = 1167341760. Its totient is φ = 98300160.

The previous prime is 378869629. The next prime is 378869663. The reversal of 378869640 is 46968873.

It is a super-2 number, since 2×378869640² = 287084408227459200, which contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 38226 + ... + 47105.

It is an arithmetic number, because the mean of its divisors is an integer number (18239715).

Almost surely, 2^378869640 is an apocalyptic number.

378869640 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

378869640 is an abundant number, since it is smaller than the sum of its proper divisors (788472120).

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

378869640 is a wasteful number, since it uses less digits than its factorization.

378869640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85382 (or 85378 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 51.

The square root of 378869640 is about 19464.5739742744. The cubic root of 378869640 is about 723.5967403178.

The spelling of 378869640 in words is "three hundred seventy-eight million, eight hundred sixty-nine thousand, six hundred forty".