28070878 has 16 divisors (see below), whose sum is σ = 46022400. Its totient is φ = 12735000.

The previous prime is 28070851. The next prime is 28070881. The reversal of 28070878 is 87807082.

It is a self number, because there is not a number n which added to its sum of digits gives 28070878.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15673 + ... + 17371.

It is an arithmetic number, because the mean of its divisors is an integer number (2876400).

Almost surely, 2^28070878 is an apocalyptic number.

28070878 is a deficient number, since it is larger than the sum of its proper divisors (17951522).

28070878 is a wasteful number, since it uses less digits than its factorization.

28070878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2463.

The product of its (nonzero) digits is 50176, while the sum is 40.

The square root of 28070878 is about 5298.1957306238. The cubic root of 28070878 is about 303.9149043332.

The spelling of 28070878 in words is "twenty-eight million, seventy thousand, eight hundred seventy-eight".