394408072 has 16 divisors (see below), whose sum is σ = 740036700. Its totient is φ = 197064960.

The previous prime is 394408031. The next prime is 394408073. The reversal of 394408072 is 270804493.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 350663076 + 43744996 = 18726^2 + 6614^2 .

It is not an unprimeable number, because it can be changed into a prime (394408073) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4797 + ... + 28492.

Almost surely, 2^394408072 is an apocalyptic number.

It is an amenable number.

394408072 is a deficient number, since it is larger than the sum of its proper divisors (345628628).

394408072 is a wasteful number, since it uses less digits than its factorization.

394408072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34776 (or 34772 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 394408072 is about 19859.7097662579. The cubic root of 394408072 is about 733.3567013674.

The spelling of 394408072 in words is "three hundred ninety-four million, four hundred eight thousand, seventy-two".