384991772 has 12 divisors (see below), whose sum is σ = 734984376. Its totient is φ = 174996240.

The previous prime is 384991753. The next prime is 384991777. The reversal of 384991772 is 277199483.

It is a self number, because there is not a number n which added to its sum of digits gives 384991772.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (384991777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4374863 + ... + 4374950.

It is an arithmetic number, because the mean of its divisors is an integer number (61248698).

Almost surely, 2^384991772 is an apocalyptic number.

It is an amenable number.

384991772 is a deficient number, since it is larger than the sum of its proper divisors (349992604).

384991772 is a wasteful number, since it uses less digits than its factorization.

384991772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8749828 (or 8749826 counting only the distinct ones).

The product of its digits is 762048, while the sum is 50.

The square root of 384991772 is about 19621.2072003738. The cubic root of 384991772 is about 727.4734524230.

The spelling of 384991772 in words is "three hundred eighty-four million, nine hundred ninety-one thousand, seven hundred seventy-two".