28768151 has 4 divisors (see below), whose sum is σ = 28778904. Its totient is φ = 28757400.

The previous prime is 28768139. The next prime is 28768153. The reversal of 28768151 is 15186782.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 28768151 - 2¹⁰ = 28767127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28768153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2141 + ... + 7881.

It is an arithmetic number, because the mean of its divisors is an integer number (7194726).

Almost surely, 2^28768151 is an apocalyptic number.

28768151 is a deficient number, since it is larger than the sum of its proper divisors (10753).

28768151 is an equidigital number, since it uses as much as digits as its factorization.

28768151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10752.

The product of its digits is 26880, while the sum is 38.

The square root of 28768151 is about 5363.5949697940. The cubic root of 28768151 is about 306.4107396643.

The spelling of 28768151 in words is "twenty-eight million, seven hundred sixty-eight thousand, one hundred fifty-one".