28653651 has 24 divisors (see below), whose sum is σ = 45783920. Its totient is φ = 17153856.

The previous prime is 28653649. The next prime is 28653659. The reversal of 28653651 is 15635682.

It is not a de Polignac number, because 28653651 - 2¹ = 28653649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28653659) 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 23 ways as a sum of consecutive naturals, for example, 1020 + ... + 7638.

Almost surely, 2^28653651 is an apocalyptic number.

28653651 is a deficient number, since it is larger than the sum of its proper divisors (17130269).

28653651 is a wasteful number, since it uses less digits than its factorization.

28653651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6675 (or 6672 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 28653651 is about 5352.9105167189. The cubic root of 28653651 is about 306.0036844360.

The spelling of 28653651 in words is "twenty-eight million, six hundred fifty-three thousand, six hundred fifty-one".