394974720 has 480 divisors, whose sum is σ = 1634181120. Its totient is φ = 86261760.

The previous prime is 394974703. The next prime is 394974731. The reversal of 394974720 is 27479493.

394974720 is a `hidden beast` number, since 3 + 94 + 97 + 472 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (480).

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 47 ways as a sum of consecutive naturals, for example, 4999641 + ... + 4999719.

It is an arithmetic number, because the mean of its divisors is an integer number (3404544).

Almost surely, 2^394974720 is an apocalyptic number.

394974720 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 394974720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (817090560).

394974720 is an abundant number, since it is smaller than the sum of its proper divisors (1239206400).

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

394974720 is a wasteful number, since it uses less digits than its factorization.

394974720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146 (or 127 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 45.

The square root of 394974720 is about 19873.9709167544. The cubic root of 394974720 is about 733.7077390246.

The spelling of 394974720 in words is "three hundred ninety-four million, nine hundred seventy-four thousand, seven hundred twenty".