28502661 has 16 divisors (see below), whose sum is σ = 41555520. Its totient is φ = 17233920.

The previous prime is 28502611. The next prime is 28502687. The reversal of 28502661 is 16620582.

It is not a de Polignac number, because 28502661 - 2⁶ = 28502597 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28502611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19525 + ... + 20933.

It is an arithmetic number, because the mean of its divisors is an integer number (2597220).

Almost surely, 2^28502661 is an apocalyptic number.

It is an amenable number.

28502661 is a deficient number, since it is larger than the sum of its proper divisors (13052859).

28502661 is a wasteful number, since it uses less digits than its factorization.

28502661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2036.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 28502661 is about 5338.7883456829. The cubic root of 28502661 is about 305.4652435586.

The spelling of 28502661 in words is "twenty-eight million, five hundred two thousand, six hundred sixty-one".