2728479644 has 48 divisors (see below), whose sum is σ = 5436831456. Its totient is φ = 1187097600.

The previous prime is 2728479631. The next prime is 2728479679. The reversal of 2728479644 is 4469748272.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81344 + ... + 109880.

It is an arithmetic number, because the mean of its divisors is an integer number (113267322).

Almost surely, 2^2728479644 is an apocalyptic number.

It is an amenable number.

2728479644 is a deficient number, since it is larger than the sum of its proper divisors (2708351812).

2728479644 is a wasteful number, since it uses less digits than its factorization.

2728479644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28646 (or 28644 counting only the distinct ones).

The product of its digits is 5419008, while the sum is 53.

The square root of 2728479644 is about 52234.8508564924. The cubic root of 2728479644 is about 1397.3554915151.

The spelling of 2728479644 in words is "two billion, seven hundred twenty-eight million, four hundred seventy-nine thousand, six hundred forty-four".