394069920 has 96 divisors (see below), whose sum is σ = 1245259008. Its totient is φ = 104752128.

The previous prime is 394069903. The next prime is 394069927. The reversal of 394069920 is 29960493.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×394069920² = 310582203697612800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (394069927) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 175042 + ... + 177278.

It is an arithmetic number, because the mean of its divisors is an integer number (12971448).

Almost surely, 2^394069920 is an apocalyptic number.

394069920 is a gapful number since it is divisible by the number (30) 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 394069920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (622629504).

394069920 is an abundant number, since it is smaller than the sum of its proper divisors (851189088).

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

394069920 is a wasteful number, since it uses less digits than its factorization.

394069920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2622 (or 2614 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 42.

The square root of 394069920 is about 19851.1944225026. The cubic root of 394069920 is about 733.1470564520.

The spelling of 394069920 in words is "three hundred ninety-four million, sixty-nine thousand, nine hundred twenty".