28125837 has 12 divisors (see below), whose sum is σ = 43016220. Its totient is φ = 17647488.

The previous prime is 28125793. The next prime is 28125841. The reversal of 28125837 is 73852182.

It can be written as a sum of positive squares in 2 ways, for example, as 23677956 + 4447881 = 4866^2 + 2109^2 .

It is not a de Polignac number, because 28125837 - 2⁷ = 28125709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28125847) 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 11 ways as a sum of consecutive naturals, for example, 91762 + ... + 92067.

It is an arithmetic number, because the mean of its divisors is an integer number (3584685).

Almost surely, 2^28125837 is an apocalyptic number.

It is an amenable number.

28125837 is a deficient number, since it is larger than the sum of its proper divisors (14890383).

28125837 is a wasteful number, since it uses less digits than its factorization.

28125837 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183852 (or 183849 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 28125837 is about 5303.3797714288. The cubic root of 28125837 is about 304.1131165209.

It can be divided in two parts, 2812 and 5837, that added together give a square (8649 = 93²).

The spelling of 28125837 in words is "twenty-eight million, one hundred twenty-five thousand, eight hundred thirty-seven".