28644682 has 32 divisors (see below), whose sum is σ = 48996864. Its totient is φ = 12441600.

The previous prime is 28644659. The next prime is 28644701.

28644682 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×28644682² = 1641035613762248, which contains 22 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, 65938 + ... + 66370.

It is an arithmetic number, because the mean of its divisors is an integer number (1531152).

Almost surely, 2^28644682 is an apocalyptic number.

28644682 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

28644682 is a deficient number, since it is larger than the sum of its proper divisors (20352182).

28644682 is a wasteful number, since it uses less digits than its factorization.

28644682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 574.

The product of its digits is 147456, while the sum is 40.

The square root of 28644682 is about 5352.0726826156. The cubic root of 28644682 is about 305.9717532700.

The spelling of 28644682 in words is "twenty-eight million, six hundred forty-four thousand, six hundred eighty-two".