28600025 has 6 divisors (see below), whose sum is σ = 35464062. Its totient is φ = 22880000.

The previous prime is 28600021. The next prime is 28600037. The reversal of 28600025 is 52000682.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 6056521 + 22543504 = 2461^2 + 4748^2 .

It is not a de Polignac number, because 28600025 - 2² = 28600021 is a prime.

It is a super-2 number, since 2×28600025² = 1635922860001250, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28600021) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 571976 + ... + 572025.

It is an arithmetic number, because the mean of its divisors is an integer number (5910677).

Almost surely, 2^28600025 is an apocalyptic number.

28600025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28600025 is a deficient number, since it is larger than the sum of its proper divisors (6864037).

28600025 is a wasteful number, since it uses less digits than its factorization.

28600025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1144011 (or 1144006 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 28600025 is about 5347.8991202153. The cubic root of 28600025 is about 305.8126674597.

The spelling of 28600025 in words is "twenty-eight million, six hundred thousand, twenty-five".