394508045 has 16 divisors (see below), whose sum is σ = 484455600. Its totient is φ = 308313600.

The previous prime is 394508011. The next prime is 394508053. The reversal of 394508045 is 540805493.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 64032004 + 330476041 = 8002^2 + 18179^2 .

It is not a de Polignac number, because 394508045 - 2²⁸ = 126072589 is a prime.

It is a congruent number.

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, 41105 + ... + 49785.

It is an arithmetic number, because the mean of its divisors is an integer number (30278475).

Almost surely, 2^394508045 is an apocalyptic number.

It is an amenable number.

394508045 is a deficient number, since it is larger than the sum of its proper divisors (89947555).

394508045 is a wasteful number, since it uses less digits than its factorization.

394508045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8896.

The product of its (nonzero) digits is 86400, while the sum is 38.

The square root of 394508045 is about 19862.2265871679. The cubic root of 394508045 is about 733.4186589193.

The spelling of 394508045 in words is "three hundred ninety-four million, five hundred eight thousand, forty-five".