28787535 has 64 divisors (see below), whose sum is σ = 59996160. Its totient is φ = 12821760.

The previous prime is 28787519. The next prime is 28787557. The reversal of 28787535 is 53578782.

It is not a de Polignac number, because 28787535 - 2⁴ = 28787519 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 38374 + ... + 39116.

It is an arithmetic number, because the mean of its divisors is an integer number (937440).

Almost surely, 2^28787535 is an apocalyptic number.

28787535 is an abundant number, since it is smaller than the sum of its proper divisors (31208625).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28787535 is a wasteful number, since it uses less digits than its factorization.

28787535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 805 (or 799 counting only the distinct ones).

The product of its digits is 470400, while the sum is 45.

The square root of 28787535 is about 5365.4016625039. The cubic root of 28787535 is about 306.4795441357.

The spelling of 28787535 in words is "twenty-eight million, seven hundred eighty-seven thousand, five hundred thirty-five".