394051072 has 40 divisors (see below), whose sum is σ = 814512600. Its totient is φ = 190224384.

The previous prime is 394051069. The next prime is 394051087. The reversal of 394051072 is 270150493.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1579 + ... + 28117.

It is an arithmetic number, because the mean of its divisors is an integer number (20362815).

Almost surely, 2^394051072 is an apocalyptic number.

394051072 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 394051072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (407256300).

394051072 is an abundant number, since it is smaller than the sum of its proper divisors (420461528).

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

394051072 is an equidigital number, since it uses as much as digits as its factorization.

394051072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26586 (or 26570 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 394051072 is about 19850.7196846865. The cubic root of 394051072 is about 733.1353676837.

The spelling of 394051072 in words is "three hundred ninety-four million, fifty-one thousand, seventy-two".