378656929 has 16 divisors (see below), whose sum is σ = 460608768. Its totient is φ = 303869952.

The previous prime is 378656923. The next prime is 378656933. The reversal of 378656929 is 929656873.

It is a cyclic number.

It is not a de Polignac number, because 378656929 - 2⁷ = 378656801 is a prime.

It is a super-2 number, since 2×378656929² = 286762139759422082, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 378656929.

It is not an unprimeable number, because it can be changed into a prime (378656923) by changing a digit.

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, 14724 + ... + 31210.

It is an arithmetic number, because the mean of its divisors is an integer number (28788048).

Almost surely, 2^378656929 is an apocalyptic number.

It is an amenable number.

378656929 is a deficient number, since it is larger than the sum of its proper divisors (81951839).

378656929 is a wasteful number, since it uses less digits than its factorization.

378656929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16704.

The product of its digits is 4898880, while the sum is 55.

The square root of 378656929 is about 19459.1091522711. The cubic root of 378656929 is about 723.4612972491.

The spelling of 378656929 in words is "three hundred seventy-eight million, six hundred fifty-six thousand, nine hundred twenty-nine".