28615851 has 12 divisors (see below), whose sum is σ = 45091800. Its totient is φ = 17342880.

The previous prime is 28615823. The next prime is 28615861. The reversal of 28615851 is 15851682.

It is not a de Polignac number, because 28615851 - 2⁵ = 28615819 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28615861) 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 11 ways as a sum of consecutive naturals, for example, 144426 + ... + 144623.

It is an arithmetic number, because the mean of its divisors is an integer number (3757650).

Almost surely, 2^28615851 is an apocalyptic number.

28615851 is a deficient number, since it is larger than the sum of its proper divisors (16475949).

28615851 is a wasteful number, since it uses less digits than its factorization.

28615851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289066 (or 289063 counting only the distinct ones).

The product of its digits is 19200, while the sum is 36.

The square root of 28615851 is about 5349.3785620388. The cubic root of 28615851 is about 305.8690648327.

The spelling of 28615851 in words is "twenty-eight million, six hundred fifteen thousand, eight hundred fifty-one".