394779712 has 56 divisors (see below), whose sum is σ = 832286880. Its totient is φ = 185149440.

The previous prime is 394779709. The next prime is 394779719. The reversal of 394779712 is 217977493.

It is not an unprimeable number, because it can be changed into a prime (394779719) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 533839 + ... + 534577.

Almost surely, 2^394779712 is an apocalyptic number.

394779712 is a gapful number since it is divisible by the number (32) 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 394779712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (416143440).

394779712 is an abundant number, since it is smaller than the sum of its proper divisors (437507168).

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

394779712 is a wasteful number, since it uses less digits than its factorization.

394779712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1259 (or 1249 counting only the distinct ones).

The product of its digits is 666792, while the sum is 49.

The square root of 394779712 is about 19869.0641953767. The cubic root of 394779712 is about 733.5869697491.

The spelling of 394779712 in words is "three hundred ninety-four million, seven hundred seventy-nine thousand, seven hundred twelve".