28856790 has 32 divisors (see below), whose sum is σ = 76952160. Its totient is φ = 7695072.

The previous prime is 28856783. The next prime is 28856797. The reversal of 28856790 is 9765882.

28856790 is a `hidden beast` number, since 2 + 88 + 567 + 9 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (28856783) and next prime (28856797).

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28856797) 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, 53169 + ... + 53708.

It is an arithmetic number, because the mean of its divisors is an integer number (2404755).

Almost surely, 2^28856790 is an apocalyptic number.

28856790 is an abundant number, since it is smaller than the sum of its proper divisors (48095370).

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

28856790 is a wasteful number, since it uses less digits than its factorization.

28856790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106893 (or 106887 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 28856790 is about 5371.8516360748. The cubic root of 28856790 is about 306.7251161957.

It can be divided in two parts, 28856 and 790, that added together give a triangular number (29646 = T₂₄₃).

The spelling of 28856790 in words is "twenty-eight million, eight hundred fifty-six thousand, seven hundred ninety".