394631516 has 12 divisors (see below), whose sum is σ = 720631632. Its totient is φ = 188736768.

The previous prime is 394631513. The next prime is 394631533. The reversal of 394631516 is 615136493.

It is a self number, because there is not a number n which added to its sum of digits gives 394631516.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394631513) 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, 2144645 + ... + 2144828.

It is an arithmetic number, because the mean of its divisors is an integer number (60052636).

Almost surely, 2^394631516 is an apocalyptic number.

It is an amenable number.

394631516 is a deficient number, since it is larger than the sum of its proper divisors (326000116).

394631516 is a wasteful number, since it uses less digits than its factorization.

394631516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4289500 (or 4289498 counting only the distinct ones).

The product of its digits is 58320, while the sum is 38.

The square root of 394631516 is about 19865.3345302816. The cubic root of 394631516 is about 733.4951647437.

The spelling of 394631516 in words is "three hundred ninety-four million, six hundred thirty-one thousand, five hundred sixteen".