28902856 has 24 divisors (see below), whose sum is σ = 57505410. Its totient is φ = 13571840.

The previous prime is 28902851. The next prime is 28902859. The reversal of 28902856 is 65820982.

It can be written as a sum of positive squares in 3 ways, for example, as 23912100 + 4990756 = 4890^2 + 2234^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28902851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 62466 + ... + 62926.

Almost surely, 2^28902856 is an apocalyptic number.

It is an amenable number.

28902856 is a deficient number, since it is larger than the sum of its proper divisors (28602554).

28902856 is an equidigital number, since it uses as much as digits as its factorization.

28902856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 945 (or 480 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 40.

The square root of 28902856 is about 5376.1376470474. The cubic root of 28902856 is about 306.8882446101. Note that the first 3 decimals are identical.

The spelling of 28902856 in words is "twenty-eight million, nine hundred two thousand, eight hundred fifty-six".