394545512 has 8 divisors (see below), whose sum is σ = 739772850. Its totient is φ = 197272752.

The previous prime is 394545497. The next prime is 394545521. The reversal of 394545512 is 215545493.

It can be written as a sum of positive squares in only one way, i.e., 364580836 + 29964676 = 19094^2 + 5474^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×394545512² = 311332322078684288, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24659087 + ... + 24659102.

Almost surely, 2^394545512 is an apocalyptic number.

It is an amenable number.

394545512 is a deficient number, since it is larger than the sum of its proper divisors (345227338).

394545512 is a wasteful number, since it uses less digits than its factorization.

394545512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49318195 (or 49318191 counting only the distinct ones).

The product of its digits is 108000, while the sum is 38.

The square root of 394545512 is about 19863.1697369780. The cubic root of 394545512 is about 733.4418761281.

The spelling of 394545512 in words is "three hundred ninety-four million, five hundred forty-five thousand, five hundred twelve".