28761325 has 12 divisors (see below), whose sum is σ = 35983188. Its totient is φ = 22803200.

The previous prime is 28761323. The next prime is 28761371. The reversal of 28761325 is 52316782.

28761325 = T₈₃₈ + T₈₃₉ + ... + T₉₁₂.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 4761124 + 24000201 = 2182^2 + 4899^2 .

It is not a de Polignac number, because 28761325 - 2¹ = 28761323 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28761323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2266 + ... + 7915.

It is an arithmetic number, because the mean of its divisors is an integer number (2998599).

Almost surely, 2^28761325 is an apocalyptic number.

28761325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28761325 is a deficient number, since it is larger than the sum of its proper divisors (7221863).

28761325 is a wasteful number, since it uses less digits than its factorization.

28761325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10304 (or 10299 counting only the distinct ones).

The product of its digits is 20160, while the sum is 34.

The square root of 28761325 is about 5362.9586050985. The cubic root of 28761325 is about 306.3865030799.

The spelling of 28761325 in words is "twenty-eight million, seven hundred sixty-one thousand, three hundred twenty-five".