28797025 has 6 divisors (see below), whose sum is σ = 35708342. Its totient is φ = 23037600.

The previous prime is 28797023. The next prime is 28797053. The reversal of 28797025 is 52079782.

It can be written as a sum of positive squares in 3 ways, for example, as 3876961 + 24920064 = 1969^2 + 4992^2 .

It is not a de Polignac number, because 28797025 - 2¹ = 28797023 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28797023) 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 5 ways as a sum of consecutive naturals, for example, 575916 + ... + 575965.

Almost surely, 2^28797025 is an apocalyptic number.

28797025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28797025 is a deficient number, since it is larger than the sum of its proper divisors (6911317).

28797025 is a wasteful number, since it uses less digits than its factorization.

28797025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1151891 (or 1151886 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 40.

The square root of 28797025 is about 5366.2859595814. The cubic root of 28797025 is about 306.5132181006.

The spelling of 28797025 in words is "twenty-eight million, seven hundred ninety-seven thousand, twenty-five".