394987122 has 12 divisors (see below), whose sum is σ = 855805470. Its totient is φ = 131662368.

The previous prime is 394987091. The next prime is 394987127. The reversal of 394987122 is 221789493.

394987122 is a `hidden beast` number, since 39 + 498 + 7 + 122 = 666.

It can be written as a sum of positive squares in only one way, i.e., 313608681 + 81378441 = 17709^2 + 9021^2 .

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (394987127) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10971847 + ... + 10971882.

Almost surely, 2^394987122 is an apocalyptic number.

394987122 is an abundant number, since it is smaller than the sum of its proper divisors (460818348).

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

394987122 is a wasteful number, since it uses less digits than its factorization.

394987122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21943737 (or 21943734 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 394987122 is about 19874.2829304607. The cubic root of 394987122 is about 733.7154182909.

The spelling of 394987122 in words is "three hundred ninety-four million, nine hundred eighty-seven thousand, one hundred twenty-two".