394787136 has 56 divisors (see below), whose sum is σ = 1047032704. Its totient is φ = 131281920.

The previous prime is 394787101. The next prime is 394787143. The reversal of 394787136 is 631787493.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86676 + ... + 91116.

Almost surely, 2^394787136 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 394787136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (523516352).

394787136 is an abundant number, since it is smaller than the sum of its proper divisors (652245568).

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

394787136 is a wasteful number, since it uses less digits than its factorization.

394787136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4919 (or 4909 counting only the distinct ones).

The product of its digits is 762048, while the sum is 48.

The square root of 394787136 is about 19869.2510175900. The cubic root of 394787136 is about 733.5915681917.

The spelling of 394787136 in words is "three hundred ninety-four million, seven hundred eighty-seven thousand, one hundred thirty-six".