394945970 has 32 divisors (see below), whose sum is σ = 765737280. Its totient is φ = 146180160.

The previous prime is 394945963. The next prime is 394945979. The reversal of 394945970 is 79549493.

It is not an unprimeable number, because it can be changed into a prime (394945979) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16001 + ... + 32340.

It is an arithmetic number, because the mean of its divisors is an integer number (23929290).

Almost surely, 2^394945970 is an apocalyptic number.

394945970 is a deficient number, since it is larger than the sum of its proper divisors (370791310).

394945970 is a wasteful number, since it uses less digits than its factorization.

394945970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48410.

The product of its (nonzero) digits is 1224720, while the sum is 50.

The square root of 394945970 is about 19873.2475957001. The cubic root of 394945970 is about 733.6899365272.

The spelling of 394945970 in words is "three hundred ninety-four million, nine hundred forty-five thousand, nine hundred seventy".