394101904 has 45 divisors (see below), whose sum is σ = 889491897. Its totient is φ = 168662592.

The previous prime is 394101893. The next prime is 394101913. The reversal of 394101904 is 409101493.

The square root of 394101904 is 19852.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 52591504 + 341510400 = 7252^2 + 18480^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 555502 + ... + 556210.

Almost surely, 2^394101904 is an apocalyptic number.

394101904 is the 19852-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 394101904

394101904 is an abundant number, since it is smaller than the sum of its proper divisors (495389993).

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

394101904 is an frugal number, since it uses more digits than its factorization.

394101904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1440 (or 718 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 31.

The cubic root of 394101904 is about 733.1668907842.

It can be divided in two parts, 39410 and 1904, that added together give a palindrome (41314).

The spelling of 394101904 in words is "three hundred ninety-four million, one hundred one thousand, nine hundred four".