28126137 has 16 divisors (see below), whose sum is σ = 42512960. Its totient is φ = 16396992.

The previous prime is 28126121. The next prime is 28126141. The reversal of 28126137 is 73162182.

It is not a de Polignac number, because 28126137 - 2⁴ = 28126121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28126117) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18238 + ... + 19719.

It is an arithmetic number, because the mean of its divisors is an integer number (2657060).

Almost surely, 2^28126137 is an apocalyptic number.

It is an amenable number.

28126137 is a deficient number, since it is larger than the sum of its proper divisors (14386823).

28126137 is a wasteful number, since it uses less digits than its factorization.

28126137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37992.

The product of its digits is 4032, while the sum is 30.

The square root of 28126137 is about 5303.4080552037. The cubic root of 28126137 is about 304.1141977760.

The spelling of 28126137 in words is "twenty-eight million, one hundred twenty-six thousand, one hundred thirty-seven".