394776872 has 64 divisors (see below), whose sum is σ = 866313600. Its totient is φ = 165162240.

The previous prime is 394776787. The next prime is 394776883. The reversal of 394776872 is 278677493.

It is a super-2 number, since 2×394776872² = 311697557332208768, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 556454 + ... + 557162.

It is an arithmetic number, because the mean of its divisors is an integer number (13536150).

Almost surely, 2^394776872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 394776872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (433156800).

394776872 is an abundant number, since it is smaller than the sum of its proper divisors (471536728).

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

394776872 is a wasteful number, since it uses less digits than its factorization.

394776872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 946 (or 942 counting only the distinct ones).

The product of its digits is 3556224, while the sum is 53.

The square root of 394776872 is about 19868.9927273629. The cubic root of 394776872 is about 733.5852106314.

The spelling of 394776872 in words is "three hundred ninety-four million, seven hundred seventy-six thousand, eight hundred seventy-two".