394971084 has 18 divisors (see below), whose sum is σ = 998399220. Its totient is φ = 131657016.

The previous prime is 394971079. The next prime is 394971089. The reversal of 394971084 is 480179493.

It is an interprime number because it is at equal distance from previous prime (394971079) and next prime (394971089).

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×394971084² = 312004314392270112, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (394971089) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5485674 + ... + 5485745.

Almost surely, 2^394971084 is an apocalyptic number.

It is an amenable number.

394971084 is an abundant number, since it is smaller than the sum of its proper divisors (603428136).

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

394971084 is a wasteful number, since it uses less digits than its factorization.

394971084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10971429 (or 10971424 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 394971084 is about 19873.8794401093. The cubic root of 394971084 is about 733.7054875983.

The spelling of 394971084 in words is "three hundred ninety-four million, nine hundred seventy-one thousand, eighty-four".