28245651 has 16 divisors (see below), whose sum is σ = 43186944. Its totient is φ = 16085664.

The previous prime is 28245641. The next prime is 28245667. The reversal of 28245651 is 15654282.

It is not a de Polignac number, because 28245651 - 2¹¹ = 28243603 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28245611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4536 + ... + 8778.

It is an arithmetic number, because the mean of its divisors is an integer number (2699184).

Almost surely, 2^28245651 is an apocalyptic number.

28245651 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

28245651 is a deficient number, since it is larger than the sum of its proper divisors (14941293).

28245651 is a wasteful number, since it uses less digits than its factorization.

28245651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4570.

The product of its digits is 19200, while the sum is 33.

The square root of 28245651 is about 5314.6637711148. The cubic root of 28245651 is about 304.5443379560.

The spelling of 28245651 in words is "twenty-eight million, two hundred forty-five thousand, six hundred fifty-one".