28070863 has 4 divisors (see below), whose sum is σ = 28239120. Its totient is φ = 27902608.

The previous prime is 28070851. The next prime is 28070881. The reversal of 28070863 is 36807082.

It is a happy number.

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 28070863 - 2⁵ = 28070831 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 (28070813) 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, 83878 + ... + 84211.

It is an arithmetic number, because the mean of its divisors is an integer number (7059780).

Almost surely, 2^28070863 is an apocalyptic number.

28070863 is a deficient number, since it is larger than the sum of its proper divisors (168257).

28070863 is a wasteful number, since it uses less digits than its factorization.

28070863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168256.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 28070863 is about 5298.1943150473. The cubic root of 28070863 is about 303.9148501997.

The spelling of 28070863 in words is "twenty-eight million, seventy thousand, eight hundred sixty-three".