1928479844 has 12 divisors (see below), whose sum is σ = 3375450624. Its totient is φ = 964065384.

The previous prime is 1928479843. The next prime is 1928479871. The reversal of 1928479844 is 4489748291.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1928479844.

It is not an unprimeable number, because it can be changed into a prime (1928479843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16964 + ... + 64379.

It is an arithmetic number, because the mean of its divisors is an integer number (281287552).

Almost surely, 2^1928479844 is an apocalyptic number.

It is an amenable number.

1928479844 is a deficient number, since it is larger than the sum of its proper divisors (1446970780).

1928479844 is a wasteful number, since it uses less digits than its factorization.

1928479844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87274 (or 87272 counting only the distinct ones).

The product of its digits is 4644864, while the sum is 56.

The square root of 1928479844 is about 43914.4605340883. The cubic root of 1928479844 is about 1244.7200962133.

The spelling of 1928479844 in words is "one billion, nine hundred twenty-eight million, four hundred seventy-nine thousand, eight hundred forty-four".