378665680 has 40 divisors (see below), whose sum is σ = 881443584. Its totient is φ = 151286400.

The previous prime is 378665657. The next prime is 378665681. The reversal of 378665680 is 86566873.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (378665681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80185 + ... + 84775.

Almost surely, 2^378665680 is an apocalyptic number.

It is an amenable number.

378665680 is an abundant number, since it is smaller than the sum of its proper divisors (502777904).

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

378665680 is a wasteful number, since it uses less digits than its factorization.

378665680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5635 (or 5629 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 49.

The square root of 378665680 is about 19459.3340071031. The cubic root of 378665680 is about 723.4668704215.

The spelling of 378665680 in words is "three hundred seventy-eight million, six hundred sixty-five thousand, six hundred eighty".