28502025 has 24 divisors (see below), whose sum is σ = 48401664. Its totient is φ = 14788800.

The previous prime is 28502009. The next prime is 28502029. The reversal of 28502025 is 52020582.

It is not a de Polignac number, because 28502025 - 2⁴ = 28502009 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28501986 and 28502004.

It is not an unprimeable number, because it can be changed into a prime (28502029) 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 23 ways as a sum of consecutive naturals, for example, 2361 + ... + 7910.

It is an arithmetic number, because the mean of its divisors is an integer number (2016736).

Almost surely, 2^28502025 is an apocalyptic number.

28502025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28502025 is a deficient number, since it is larger than the sum of its proper divisors (19899639).

28502025 is a wasteful number, since it uses less digits than its factorization.

28502025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10321 (or 10316 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 28502025 is about 5338.7287812737. The cubic root of 28502025 is about 305.4629715211.

The spelling of 28502025 in words is "twenty-eight million, five hundred two thousand, twenty-five".