28075653 has 20 divisors (see below), whose sum is σ = 44409420. Its totient is φ = 17615232.

The previous prime is 28075643. The next prime is 28075657. The reversal of 28075653 is 35657082.

It can be written as a sum of positive squares in 2 ways, for example, as 24770529 + 3305124 = 4977^2 + 1818^2 .

It is not a de Polignac number, because 28075653 - 2⁶ = 28075589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28075657) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 8818 + ... + 11571.

It is an arithmetic number, because the mean of its divisors is an integer number (2220471).

Almost surely, 2^28075653 is an apocalyptic number.

It is an amenable number.

28075653 is a deficient number, since it is larger than the sum of its proper divisors (16333767).

28075653 is a wasteful number, since it uses less digits than its factorization.

28075653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20418 (or 20409 counting only the distinct ones).

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

The square root of 28075653 is about 5298.6463365656. The cubic root of 28075653 is about 303.9321358497.

The spelling of 28075653 in words is "twenty-eight million, seventy-five thousand, six hundred fifty-three".