28502864 has 60 divisors (see below), whose sum is σ = 60996096. Its totient is φ = 12894336.

The previous prime is 28502861. The next prime is 28502893. The reversal of 28502864 is 46820582.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28502861) 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 11 ways as a sum of consecutive naturals, for example, 224369 + ... + 224495.

Almost surely, 2^28502864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28502864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30498048).

28502864 is an abundant number, since it is smaller than the sum of its proper divisors (32493232).

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

28502864 is a wasteful number, since it uses less digits than its factorization.

28502864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244 (or 225 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 35.

The square root of 28502864 is about 5338.8073574535. The cubic root of 28502864 is about 305.4659687458.

The spelling of 28502864 in words is "twenty-eight million, five hundred two thousand, eight hundred sixty-four".