28126937 has 4 divisors (see below), whose sum is σ = 28443060. Its totient is φ = 27810816.

The previous prime is 28126913. The next prime is 28126949. The reversal of 28126937 is 73962182.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10621081 + 17505856 = 3259^2 + 4184^2 .

It is a cyclic number.

It is not a de Polignac number, because 28126937 - 2⁶ = 28126873 is a prime.

It is a super-2 number, since 2×28126937² = 1582249170003938, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28126937.

It is not an unprimeable number, because it can be changed into a prime (28126997) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 157928 + ... + 158105.

It is an arithmetic number, because the mean of its divisors is an integer number (7110765).

Almost surely, 2^28126937 is an apocalyptic number.

It is an amenable number.

28126937 is a deficient number, since it is larger than the sum of its proper divisors (316123).

28126937 is an equidigital number, since it uses as much as digits as its factorization.

28126937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316122.

The product of its digits is 36288, while the sum is 38.

The square root of 28126937 is about 5303.4834778662. The cubic root of 28126937 is about 304.1170810852.

The spelling of 28126937 in words is "twenty-eight million, one hundred twenty-six thousand, nine hundred thirty-seven".