394091516 has 36 divisors (see below), whose sum is σ = 863975448. Its totient is φ = 155903328.

The previous prime is 394091497. The next prime is 394091519. The reversal of 394091516 is 615190493.

It is a self number, because there is not a number n which added to its sum of digits gives 394091516.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394091519) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 74786 + ... + 79881.

It is an arithmetic number, because the mean of its divisors is an integer number (23999318).

Almost surely, 2^394091516 is an apocalyptic number.

It is an amenable number.

394091516 is an abundant number, since it is smaller than the sum of its proper divisors (469883932).

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

394091516 is a wasteful number, since it uses less digits than its factorization.

394091516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154698 (or 154689 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 38.

The square root of 394091516 is about 19851.7383621687. The cubic root of 394091516 is about 733.1604489608.

The spelling of 394091516 in words is "three hundred ninety-four million, ninety-one thousand, five hundred sixteen".