394669140 has 48 divisors (see below), whose sum is σ = 1163238720. Its totient is φ = 99705600.

The previous prime is 394669139. The next prime is 394669141. The reversal of 394669140 is 41966493.

It is an interprime number because it is at equal distance from previous prime (394669139) and next prime (394669141).

It is a junction number, because it is equal to n+sod(n) for n = 394669092 and 394669101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394669141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 171961 + ... + 174240.

It is an arithmetic number, because the mean of its divisors is an integer number (24234140).

Almost surely, 2^394669140 is an apocalyptic number.

394669140 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

394669140 is an abundant number, since it is smaller than the sum of its proper divisors (768569580).

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

394669140 is a wasteful number, since it uses less digits than its factorization.

394669140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346232 (or 346230 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 42.

The square root of 394669140 is about 19866.2814839617. The cubic root of 394669140 is about 733.5184743747.

The spelling of 394669140 in words is "three hundred ninety-four million, six hundred sixty-nine thousand, one hundred forty".