394752636 has 96 divisors (see below), whose sum is σ = 1064591360. Its totient is φ = 126360000.

The previous prime is 394752629. The next prime is 394752641. The reversal of 394752636 is 636257493.

394752636 is a `hidden beast` number, since 3 + 9 + 4 + 7 + 5 + 2 + 636 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 394752591 and 394752600.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 525261 + ... + 526011.

Almost surely, 2^394752636 is an apocalyptic number.

394752636 is a gapful number since it is divisible by the number (36) 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 394752636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (532295680).

394752636 is an abundant number, since it is smaller than the sum of its proper divisors (669838724).

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

394752636 is a wasteful number, since it uses less digits than its factorization.

394752636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 952 (or 944 counting only the distinct ones).

The product of its digits is 816480, while the sum is 45.

The square root of 394752636 is about 19868.3828229678. The cubic root of 394752636 is about 733.5701983242.

The spelling of 394752636 in words is "three hundred ninety-four million, seven hundred fifty-two thousand, six hundred thirty-six".