28513607 has 6 divisors (see below), whose sum is σ = 30289848. Its totient is φ = 26836064.

The previous prime is 28513577. The next prime is 28513621. The reversal of 28513607 is 70631582.

It is a happy number.

It is not a de Polignac number, because 28513607 - 2¹⁶ = 28448071 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28513207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 49043 + ... + 49620.

It is an arithmetic number, because the mean of its divisors is an integer number (5048308).

Almost surely, 2^28513607 is an apocalyptic number.

28513607 is a deficient number, since it is larger than the sum of its proper divisors (1776241).

28513607 is an equidigital number, since it uses as much as digits as its factorization.

28513607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98697 (or 98680 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 28513607 is about 5339.8133862524. The cubic root of 28513607 is about 305.5043415996.

The spelling of 28513607 in words is "twenty-eight million, five hundred thirteen thousand, six hundred seven".