28705746 has 32 divisors (see below), whose sum is σ = 58978368. Its totient is φ = 9311040.

The previous prime is 28705727. The next prime is 28705759. The reversal of 28705746 is 64750782.

It is a super-3 number, since 3×28705746³ (a number of 23 digits) contains 333 as substring.

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, 38796 + ... + 39528.

It is an arithmetic number, because the mean of its divisors is an integer number (1843074).

Almost surely, 2^28705746 is an apocalyptic number.

28705746 is an abundant number, since it is smaller than the sum of its proper divisors (30272622).

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

28705746 is a wasteful number, since it uses less digits than its factorization.

28705746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 906.

The product of its (nonzero) digits is 94080, while the sum is 39.

The square root of 28705746 is about 5357.7743513515. The cubic root of 28705746 is about 306.1890198730.

The spelling of 28705746 in words is "twenty-eight million, seven hundred five thousand, seven hundred forty-six".