394506720 has 384 divisors, whose sum is σ = 1480550400. Its totient is φ = 97929216.

The previous prime is 394506689. The next prime is 394506731. The reversal of 394506720 is 27605493.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 5888127 + ... + 5888193.

It is an arithmetic number, because the mean of its divisors is an integer number (3855600).

Almost surely, 2^394506720 is an apocalyptic number.

394506720 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 394506720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (740275200).

394506720 is an abundant number, since it is smaller than the sum of its proper divisors (1086043680).

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

394506720 is a wasteful number, since it uses less digits than its factorization.

394506720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167 (or 153 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The square root of 394506720 is about 19862.1932323699. The cubic root of 394506720 is about 733.4178378285.

The spelling of 394506720 in words is "three hundred ninety-four million, five hundred six thousand, seven hundred twenty".