28588025 has 12 divisors (see below), whose sum is σ = 35530092. Its totient is φ = 22818240.

The previous prime is 28588019. The next prime is 28588031. The reversal of 28588025 is 52088582.

It is an interprime number because it is at equal distance from previous prime (28588019) and next prime (28588031).

It can be written as a sum of positive squares in 6 ways, for example, as 3857296 + 24730729 = 1964^2 + 4973^2 .

It is a de Polignac number, because none of the positive numbers 2^k-28588025 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28588025.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12899 + ... + 14951.

It is an arithmetic number, because the mean of its divisors is an integer number (2960841).

Almost surely, 2^28588025 is an apocalyptic number.

28588025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28588025 is a deficient number, since it is larger than the sum of its proper divisors (6942067).

28588025 is a wasteful number, since it uses less digits than its factorization.

28588025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2620 (or 2615 counting only the distinct ones).

The product of its (nonzero) digits is 51200, while the sum is 38.

The square root of 28588025 is about 5346.7770666075. Note that the first 3 decimals coincide. The cubic root of 28588025 is about 305.7698905113.

The spelling of 28588025 in words is "twenty-eight million, five hundred eighty-eight thousand, twenty-five".