28263767 has 4 divisors (see below), whose sum is σ = 32301456. Its totient is φ = 24226080.

The previous prime is 28263743. The next prime is 28263769. The reversal of 28263767 is 76736282.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28263767 - 2¹⁰ = 28262743 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 (28263769) 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, 2018834 + ... + 2018847.

It is an arithmetic number, because the mean of its divisors is an integer number (8075364).

Almost surely, 2^28263767 is an apocalyptic number.

28263767 is a deficient number, since it is larger than the sum of its proper divisors (4037689).

28263767 is an equidigital number, since it uses as much as digits as its factorization.

28263767 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4037688.

The product of its digits is 169344, while the sum is 41.

The square root of 28263767 is about 5316.3678390420. The cubic root of 28263767 is about 304.6094328873.

The spelling of 28263767 in words is "twenty-eight million, two hundred sixty-three thousand, seven hundred sixty-seven".