394872240 has 80 divisors (see below), whose sum is σ = 1398981888. Its totient is φ = 90256128.

The previous prime is 394872217. The next prime is 394872253. The reversal of 394872240 is 42278493.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

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, 115842 + ... + 119201.

Almost surely, 2^394872240 is an apocalyptic number.

394872240 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

394872240 is an abundant number, since it is smaller than the sum of its proper divisors (1004109648).

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

394872240 is a wasteful number, since it uses less digits than its factorization.

394872240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235066 (or 235060 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 39.

The square root of 394872240 is about 19871.3925027915. The cubic root of 394872240 is about 733.6442776863.

The spelling of 394872240 in words is "three hundred ninety-four million, eight hundred seventy-two thousand, two hundred forty".