28276137 has 12 divisors (see below), whose sum is σ = 40893424. Its totient is φ = 18827640.

The previous prime is 28276121. The next prime is 28276139. The reversal of 28276137 is 73167282.

It is not a de Polignac number, because 28276137 - 2⁴ = 28276121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28276139) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9198 + ... + 11880.

Almost surely, 2^28276137 is an apocalyptic number.

It is an amenable number.

28276137 is a deficient number, since it is larger than the sum of its proper divisors (12617287).

28276137 is a wasteful number, since it uses less digits than its factorization.

28276137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3860 (or 3857 counting only the distinct ones).

The product of its digits is 28224, while the sum is 36.

The square root of 28276137 is about 5317.5311000501. The cubic root of 28276137 is about 304.6538651471.

The spelling of 28276137 in words is "twenty-eight million, two hundred seventy-six thousand, one hundred thirty-seven".