394949617524 has 432 divisors, whose sum is σ = 1317629791296. Its totient is φ = 102288614400.

The previous prime is 394949617507. The next prime is 394949617529. The reversal of 394949617524 is 425716949493.

394949617524 is a `hidden beast` number, since 3 + 9 + 4 + 9 + 4 + 9 + 617 + 5 + 2 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394949617529) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 226851294 + ... + 226853034.

Almost surely, 2^394949617524 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 394949617524, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (658814895648).

394949617524 is an abundant number, since it is smaller than the sum of its proper divisors (922680173772).

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

394949617524 is a wasteful number, since it uses less digits than its factorization.

394949617524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2218 (or 2197 counting only the distinct ones).

The product of its digits is 58786560, while the sum is 63.

The spelling of 394949617524 in words is "three hundred ninety-four billion, nine hundred forty-nine million, six hundred seventeen thousand, five hundred twenty-four".