28855651 has 4 divisors (see below), whose sum is σ = 31478904. Its totient is φ = 26232400.

The previous prime is 28855649. The next prime is 28855663. The reversal of 28855651 is 15655882.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28855651 - 2¹ = 28855649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28855621) 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 3 ways as a sum of consecutive naturals, for example, 1311610 + ... + 1311631.

It is an arithmetic number, because the mean of its divisors is an integer number (7869726).

Almost surely, 2^28855651 is an apocalyptic number.

28855651 is a deficient number, since it is larger than the sum of its proper divisors (2623253).

28855651 is a wasteful number, since it uses less digits than its factorization.

28855651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2623252.

The product of its digits is 96000, while the sum is 40.

The square root of 28855651 is about 5371.7456194425. The cubic root of 28855651 is about 306.7210805828.

The spelling of 28855651 in words is "twenty-eight million, eight hundred fifty-five thousand, six hundred fifty-one".