28705748 has 24 divisors (see below), whose sum is σ = 53212992. Its totient is φ = 13521024.

The previous prime is 28705727. The next prime is 28705759. The reversal of 28705748 is 84750782.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3836 + ... + 8492.

It is an arithmetic number, because the mean of its divisors is an integer number (2217208).

Almost surely, 2^28705748 is an apocalyptic number.

It is an amenable number.

28705748 is a deficient number, since it is larger than the sum of its proper divisors (24507244).

28705748 is a wasteful number, since it uses less digits than its factorization.

28705748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4751 (or 4749 counting only the distinct ones).

The product of its (nonzero) digits is 125440, while the sum is 41.

The square root of 28705748 is about 5357.7745379962. The cubic root of 28705748 is about 306.1890269839.

The spelling of 28705748 in words is "twenty-eight million, seven hundred five thousand, seven hundred forty-eight".