380978690 has 16 divisors (see below), whose sum is σ = 721854720. Its totient is φ = 144370800.

The previous prime is 380978657. The next prime is 380978729. The reversal of 380978690 is 96879083.

It is a super-2 number, since 2×380978690² = 290289524468232200, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1002386 + ... + 1002765.

It is an arithmetic number, because the mean of its divisors is an integer number (45115920).

Almost surely, 2^380978690 is an apocalyptic number.

380978690 is a deficient number, since it is larger than the sum of its proper divisors (340876030).

380978690 is a wasteful number, since it uses less digits than its factorization.

380978690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2005177.

The product of its (nonzero) digits is 653184, while the sum is 50.

The square root of 380978690 is about 19518.6754161239. The cubic root of 380978690 is about 724.9369362506.

The spelling of 380978690 in words is "three hundred eighty million, nine hundred seventy-eight thousand, six hundred ninety".