1928684772 has 72 divisors (see below), whose sum is σ = 5707683072. Its totient is φ = 537609600.

The previous prime is 1928684729. The next prime is 1928684831. The reversal of 1928684772 is 2774868291.

It is a happy number.

1928684772 is a `hidden beast` number, since 1 + 92 + 86 + 8 + 477 + 2 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 83004 + ... + 103667.

It is an arithmetic number, because the mean of its divisors is an integer number (79273376).

Almost surely, 2^1928684772 is an apocalyptic number.

1928684772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1928684772 is an abundant number, since it is smaller than the sum of its proper divisors (3778998300).

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

1928684772 is a wasteful number, since it uses less digits than its factorization.

1928684772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186729 (or 186724 counting only the distinct ones).

The product of its digits is 2709504, while the sum is 54.

The square root of 1928684772 is about 43916.7937354265. The cubic root of 1928684772 is about 1244.7641843010.

The spelling of 1928684772 in words is "one billion, nine hundred twenty-eight million, six hundred eighty-four thousand, seven hundred seventy-two".