394884720 has 320 divisors, whose sum is σ = 1437348480. Its totient is φ = 100776960.

The previous prime is 394884719. The next prime is 394884767. The reversal of 394884720 is 27488493.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6473490 + ... + 6473550.

It is an arithmetic number, because the mean of its divisors is an integer number (4491714).

Almost surely, 2^394884720 is an apocalyptic number.

394884720 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 394884720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (718674240).

394884720 is an abundant number, since it is smaller than the sum of its proper divisors (1042463760).

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

394884720 is an equidigital number, since it uses as much as digits as its factorization.

394884720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132 (or 108 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The square root of 394884720 is about 19871.7065195720. The cubic root of 394884720 is about 733.6520065863.

The spelling of 394884720 in words is "three hundred ninety-four million, eight hundred eighty-four thousand, seven hundred twenty".