394657379440 has 160 divisors (see below), whose sum is σ = 951959070720. Its totient is φ = 152062310400.

The previous prime is 394657379423. The next prime is 394657379443. The reversal of 394657379440 is 44973756493.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394657379443) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 229317780 + ... + 229319500.

It is an arithmetic number, because the mean of its divisors is an integer number (5949744192).

Almost surely, 2^394657379440 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 394657379440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (475979535360).

394657379440 is an abundant number, since it is smaller than the sum of its proper divisors (557301691280).

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

394657379440 is a wasteful number, since it uses less digits than its factorization.

394657379440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2711 (or 2705 counting only the distinct ones).

The product of its (nonzero) digits is 68584320, while the sum is 61.

The spelling of 394657379440 in words is "three hundred ninety-four billion, six hundred fifty-seven million, three hundred seventy-nine thousand, four hundred forty".