28682621 has 16 divisors (see below), whose sum is σ = 33369408. Its totient is φ = 24364800.

The previous prime is 28682617. The next prime is 28682623. The reversal of 28682621 is 12628682.

It is a cyclic number.

It is not a de Polignac number, because 28682621 - 2² = 28682617 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28682623) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30011 + ... + 30951.

It is an arithmetic number, because the mean of its divisors is an integer number (2085588).

Almost surely, 2^28682621 is an apocalyptic number.

It is an amenable number.

28682621 is a deficient number, since it is larger than the sum of its proper divisors (4686787).

28682621 is a wasteful number, since it uses less digits than its factorization.

28682621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1132.

The product of its digits is 18432, while the sum is 35.

The square root of 28682621 is about 5355.6158376045. The cubic root of 28682621 is about 306.1067770670.

The spelling of 28682621 in words is "twenty-eight million, six hundred eighty-two thousand, six hundred twenty-one".