28704044 has 6 divisors (see below), whose sum is σ = 50232084. Its totient is φ = 14352020.

The previous prime is 28704017. The next prime is 28704061. The reversal of 28704044 is 44040782.

It is a junction number, because it is equal to n+sod(n) for n = 28703998 and 28704016.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3588002 + ... + 3588009.

It is an arithmetic number, because the mean of its divisors is an integer number (8372014).

Almost surely, 2^28704044 is an apocalyptic number.

It is an amenable number.

28704044 is a deficient number, since it is larger than the sum of its proper divisors (21528040).

28704044 is a wasteful number, since it uses less digits than its factorization.

28704044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7176015 (or 7176013 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 29.

The square root of 28704044 is about 5357.6155143870. The cubic root of 28704044 is about 306.1829683086.

The spelling of 28704044 in words is "twenty-eight million, seven hundred four thousand, forty-four".