394250747904 has 680 divisors, whose sum is σ = 1318883587560. Its totient is φ = 116530348032.

The previous prime is 394250747893. The next prime is 394250747911. The reversal of 394250747904 is 409747052493.

394250747904 is a `hidden beast` number, since 3 + 9 + 4 + 2 + 507 + 47 + 90 + 4 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 101093474304 + 293157273600 = 317952^2 + 541440^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2001272734 + ... + 2001272930.

Almost surely, 2^394250747904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 394250747904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (659441793780).

394250747904 is an abundant number, since it is smaller than the sum of its proper divisors (924632839656).

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

394250747904 is an equidigital number, since it uses as much as digits as its factorization.

394250747904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283 (or 244 counting only the distinct ones).

The product of its (nonzero) digits is 7620480, while the sum is 54.

The spelling of 394250747904 in words is "three hundred ninety-four billion, two hundred fifty million, seven hundred forty-seven thousand, nine hundred four".