394317924 has 192 divisors, whose sum is σ = 1308690432. Its totient is φ = 88934400.

The previous prime is 394317919. The next prime is 394317997. The reversal of 394317924 is 429713493.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 203239 + ... + 205169.

It is an arithmetic number, because the mean of its divisors is an integer number (6816096).

Almost surely, 2^394317924 is an apocalyptic number.

394317924 is a gapful number since it is divisible by the number (34) 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 394317924, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (654345216).

394317924 is an abundant number, since it is smaller than the sum of its proper divisors (914372508).

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

394317924 is a wasteful number, since it uses less digits than its factorization.

394317924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1986 (or 1984 counting only the distinct ones).

The product of its digits is 163296, while the sum is 42.

The square root of 394317924 is about 19857.4400162760. The cubic root of 394317924 is about 733.3008238114.

The spelling of 394317924 in words is "three hundred ninety-four million, three hundred seventeen thousand, nine hundred twenty-four".