28749159 has 24 divisors (see below), whose sum is σ = 45051552. Its totient is φ = 17594880.

The previous prime is 28749143. The next prime is 28749163. The reversal of 28749159 is 95194782.

It is not a de Polignac number, because 28749159 - 2⁴ = 28749143 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28749169) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3982 + ... + 8564.

It is an arithmetic number, because the mean of its divisors is an integer number (1877148).

Almost surely, 2^28749159 is an apocalyptic number.

28749159 is a deficient number, since it is larger than the sum of its proper divisors (16302393).

28749159 is a wasteful number, since it uses less digits than its factorization.

28749159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4647 (or 4644 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 28749159 is about 5361.8242231539. The cubic root of 28749159 is about 306.3432966340.

The spelling of 28749159 in words is "twenty-eight million, seven hundred forty-nine thousand, one hundred fifty-nine".