394198656 has 64 divisors (see below), whose sum is σ = 1092640320. Its totient is φ = 125683712.

The previous prime is 394198631. The next prime is 394198667. The reversal of 394198656 is 656891493.

It is a tau number, because it is divible by the number of its divisors (64).

It is a junction number, because it is equal to n+sod(n) for n = 394198599 and 394198608.

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, 13485 + ... + 31148.

It is an arithmetic number, because the mean of its divisors is an integer number (17072505).

Almost surely, 2^394198656 is an apocalyptic number.

It is an amenable number.

394198656 is an abundant number, since it is smaller than the sum of its proper divisors (698441664).

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

394198656 is a wasteful number, since it uses less digits than its factorization.

394198656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44673 (or 44661 counting only the distinct ones).

The product of its digits is 1399680, while the sum is 51.

The square root of 394198656 is about 19854.4366830187. The cubic root of 394198656 is about 733.2268833548.

The spelling of 394198656 in words is "three hundred ninety-four million, one hundred ninety-eight thousand, six hundred fifty-six".