28726325 has 6 divisors (see below), whose sum is σ = 35620674. Its totient is φ = 22981040.

The previous prime is 28726307. The next prime is 28726331. The reversal of 28726325 is 52362782.

It can be written as a sum of positive squares in 3 ways, for example, as 61009 + 28665316 = 247^2 + 5354^2 .

It is not a de Polignac number, because 28726325 - 2⁶ = 28726261 is a prime.

It is a super-3 number, since 3×28726325³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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, 574502 + ... + 574551.

It is an arithmetic number, because the mean of its divisors is an integer number (5936779).

Almost surely, 2^28726325 is an apocalyptic number.

28726325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28726325 is a deficient number, since it is larger than the sum of its proper divisors (6894349).

28726325 is a wasteful number, since it uses less digits than its factorization.

28726325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1149063 (or 1149058 counting only the distinct ones).

The product of its digits is 40320, while the sum is 35.

The square root of 28726325 is about 5359.6944875618. The cubic root of 28726325 is about 306.2621708338.

The spelling of 28726325 in words is "twenty-eight million, seven hundred twenty-six thousand, three hundred twenty-five".