28291653 has 16 divisors (see below), whose sum is σ = 45138240. Its totient is φ = 17410032.

The previous prime is 28291651. The next prime is 28291687. The reversal of 28291653 is 35619282.

It is not a de Polignac number, because 28291653 - 2¹ = 28291651 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28291651) 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, 39951 + ... + 40652.

It is an arithmetic number, because the mean of its divisors is an integer number (2821140).

Almost surely, 2^28291653 is an apocalyptic number.

It is an amenable number.

28291653 is a deficient number, since it is larger than the sum of its proper divisors (16846587).

28291653 is a wasteful number, since it uses less digits than its factorization.

28291653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80625 (or 80619 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 28291653 is about 5318.9898477060. The cubic root of 28291653 is about 304.7095793230.

The spelling of 28291653 in words is "twenty-eight million, two hundred ninety-one thousand, six hundred fifty-three".