28781795 has 32 divisors (see below), whose sum is σ = 41803776. Its totient is φ = 18604800.

The previous prime is 28781773. The next prime is 28781807. The reversal of 28781795 is 59718782.

It is not a de Polignac number, because 28781795 - 2¹⁰ = 28780771 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44162 + ... + 44808.

It is an arithmetic number, because the mean of its divisors is an integer number (1306368).

Almost surely, 2^28781795 is an apocalyptic number.

28781795 is a deficient number, since it is larger than the sum of its proper divisors (13021981).

28781795 is a wasteful number, since it uses less digits than its factorization.

28781795 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 731.

The product of its digits is 282240, while the sum is 47.

The square root of 28781795 is about 5364.8667271424. The cubic root of 28781795 is about 306.4591729401.

The spelling of 28781795 in words is "twenty-eight million, seven hundred eighty-one thousand, seven hundred ninety-five".