394811772 has 24 divisors (see below), whose sum is σ = 930174336. Its totient is φ = 130325808.

The previous prime is 394811761. The next prime is 394811779. The reversal of 394811772 is 277118493.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394811779) 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, 158478 + ... + 160949.

It is an arithmetic number, because the mean of its divisors is an integer number (38757264).

Almost surely, 2^394811772 is an apocalyptic number.

It is an amenable number.

394811772 is an abundant number, since it is smaller than the sum of its proper divisors (535362564).

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

394811772 is a wasteful number, since it uses less digits than its factorization.

394811772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319537 (or 319535 counting only the distinct ones).

The product of its digits is 84672, while the sum is 42.

The square root of 394811772 is about 19869.8709608291. The cubic root of 394811772 is about 733.6068273735.

The spelling of 394811772 in words is "three hundred ninety-four million, eight hundred eleven thousand, seven hundred seventy-two".