28650537 has 16 divisors (see below), whose sum is σ = 44680000. Its totient is φ = 18094752.

The previous prime is 28650533. The next prime is 28650551. The reversal of 28650537 is 73505682.

It is not a de Polignac number, because 28650537 - 2² = 28650533 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28650533) 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, 27412 + ... + 28437.

It is an arithmetic number, because the mean of its divisors is an integer number (2792500).

Almost surely, 2^28650537 is an apocalyptic number.

28650537 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

28650537 is a deficient number, since it is larger than the sum of its proper divisors (16029463).

28650537 is a wasteful number, since it uses less digits than its factorization.

28650537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55877 (or 55871 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 28650537 is about 5352.6196390179. The cubic root of 28650537 is about 305.9925988214.

The spelling of 28650537 in words is "twenty-eight million, six hundred fifty thousand, five hundred thirty-seven".