28426137 has 16 divisors (see below), whose sum is σ = 39690240. Its totient is φ = 18062352.

The previous prime is 28426129. The next prime is 28426171. The reversal of 28426137 is 73162482.

It is not a de Polignac number, because 28426137 - 2³ = 28426129 is a prime.

It is a super-3 number, since 3×28426137³ (a number of 23 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28426098 and 28426107.

It is not an unprimeable number, because it can be changed into a prime (28426187) 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, 25608 + ... + 26694.

It is an arithmetic number, because the mean of its divisors is an integer number (2480640).

Almost surely, 2^28426137 is an apocalyptic number.

It is an amenable number.

28426137 is a deficient number, since it is larger than the sum of its proper divisors (11264103).

28426137 is a wasteful number, since it uses less digits than its factorization.

28426137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1492.

The product of its digits is 16128, while the sum is 33.

The square root of 28426137 is about 5331.6167341623. The cubic root of 28426137 is about 305.1916273160.

The spelling of 28426137 in words is "twenty-eight million, four hundred twenty-six thousand, one hundred thirty-seven".