28826661 has 4 divisors (see below), whose sum is σ = 38435552. Its totient is φ = 19217772.

The previous prime is 28826657. The next prime is 28826671. The reversal of 28826661 is 16662882.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 28826661 - 2² = 28826657 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 (28826671) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4804441 + ... + 4804446.

It is an arithmetic number, because the mean of its divisors is an integer number (9608888).

Almost surely, 2^28826661 is an apocalyptic number.

It is an amenable number.

28826661 is a deficient number, since it is larger than the sum of its proper divisors (9608891).

28826661 is an equidigital number, since it uses as much as digits as its factorization.

28826661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9608890.

The product of its digits is 55296, while the sum is 39.

The square root of 28826661 is about 5369.0465634040. The cubic root of 28826661 is about 306.6183297844.

The spelling of 28826661 in words is "twenty-eight million, eight hundred twenty-six thousand, six hundred sixty-one".