394775136 has 144 divisors (see below), whose sum is σ = 1305158400. Its totient is φ = 110847744.

The previous prime is 394775113. The next prime is 394775149. The reversal of 394775136 is 631577493.

It is a tau number, because it is divible by the number of its divisors (144).

It is a junction number, because it is equal to n+sod(n) for n = 394775091 and 394775100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 117285 + ... + 120603.

It is an arithmetic number, because the mean of its divisors is an integer number (9063600).

Almost surely, 2^394775136 is an apocalyptic number.

394775136 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 394775136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (652579200).

394775136 is an abundant number, since it is smaller than the sum of its proper divisors (910383264).

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

394775136 is a wasteful number, since it uses less digits than its factorization.

394775136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3401 (or 3390 counting only the distinct ones).

The product of its digits is 476280, while the sum is 45.

The square root of 394775136 is about 19868.9490411546. The cubic root of 394775136 is about 733.5841353355.

The spelling of 394775136 in words is "three hundred ninety-four million, seven hundred seventy-five thousand, one hundred thirty-six".