28644706 has 16 divisors (see below), whose sum is σ = 45028224. Its totient is φ = 13640704.

The previous prime is 28644701. The next prime is 28644719. The reversal of 28644706 is 60744682.

It is not an unprimeable number, because it can be changed into a prime (28644701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10611 + ... + 13033.

It is an arithmetic number, because the mean of its divisors is an integer number (2814264).

Almost surely, 2^28644706 is an apocalyptic number.

28644706 is a deficient number, since it is larger than the sum of its proper divisors (16383518).

28644706 is a wasteful number, since it uses less digits than its factorization.

28644706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2705.

The product of its (nonzero) digits is 64512, while the sum is 37.

The square root of 28644706 is about 5352.0749247371. The cubic root of 28644706 is about 305.9718387230.

The spelling of 28644706 in words is "twenty-eight million, six hundred forty-four thousand, seven hundred six".