28814878 has 4 divisors (see below), whose sum is σ = 43222320. Its totient is φ = 14407438.

The previous prime is 28814869. The next prime is 28814879. The reversal of 28814878 is 87841882.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28814879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7203718 + ... + 7203721.

It is an arithmetic number, because the mean of its divisors is an integer number (10805580).

Almost surely, 2^28814878 is an apocalyptic number.

28814878 is a deficient number, since it is larger than the sum of its proper divisors (14407442).

28814878 is a wasteful number, since it uses less digits than its factorization.

28814878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14407441.

The product of its digits is 229376, while the sum is 46.

The square root of 28814878 is about 5367.9491428291. The cubic root of 28814878 is about 306.5765469807.

It can be divided in two parts, 28814 and 878, that added together give a palindrome (29692).

The spelling of 28814878 in words is "twenty-eight million, eight hundred fourteen thousand, eight hundred seventy-eight".