394539867 has 12 divisors (see below), whose sum is σ = 589542720. Its totient is φ = 253956528.

The previous prime is 394539863. The next prime is 394539877. The reversal of 394539867 is 768935493.

It is not a de Polignac number, because 394539867 - 2² = 394539863 is a prime.

It is not an unprimeable number, because it can be changed into a prime (394539863) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 755563 + ... + 756084.

It is an arithmetic number, because the mean of its divisors is an integer number (49128560).

Almost surely, 2^394539867 is an apocalyptic number.

394539867 is a deficient number, since it is larger than the sum of its proper divisors (195002853).

394539867 is a wasteful number, since it uses less digits than its factorization.

394539867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1511682 (or 1511679 counting only the distinct ones).

The product of its digits is 4898880, while the sum is 54.

The square root of 394539867 is about 19863.0276393102. The cubic root of 394539867 is about 733.4383781801.

The spelling of 394539867 in words is "three hundred ninety-four million, five hundred thirty-nine thousand, eight hundred sixty-seven".