28636790 has 32 divisors (see below), whose sum is σ = 63443520. Its totient is φ = 9062784.

The previous prime is 28636787. The next prime is 28636793. The reversal of 28636790 is 9763682.

It is an interprime number because it is at equal distance from previous prime (28636787) and next prime (28636793).

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28636793) 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, 14825 + ... + 16644.

It is an arithmetic number, because the mean of its divisors is an integer number (1982610).

Almost surely, 2^28636790 is an apocalyptic number.

28636790 is an abundant number, since it is smaller than the sum of its proper divisors (34806730).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28636790 is a wasteful number, since it uses less digits than its factorization.

28636790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31496.

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 28636790 is about 5351.3353473689. The cubic root of 28636790 is about 305.9436508940.

The spelling of 28636790 in words is "twenty-eight million, six hundred thirty-six thousand, seven hundred ninety".