394106440 has 64 divisors (see below), whose sum is σ = 1091381760. Its totient is φ = 124727040.

The previous prime is 394106429. The next prime is 394106477. The reversal of 394106440 is 44601493.

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, 50496 + ... + 57775.

It is an arithmetic number, because the mean of its divisors is an integer number (17052840).

Almost surely, 2^394106440 is an apocalyptic number.

It is an amenable number.

394106440 is an abundant number, since it is smaller than the sum of its proper divisors (697275320).

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

394106440 is a wasteful number, since it uses less digits than its factorization.

394106440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108302 (or 108298 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 394106440 is about 19852.1142450873. The cubic root of 394106440 is about 733.1697036203.

The spelling of 394106440 in words is "three hundred ninety-four million, one hundred six thousand, four hundred forty".