28141278 has 16 divisors (see below), whose sum is σ = 61399296. Its totient is φ = 8527640.

The previous prime is 28141247. The next prime is 28141279. The reversal of 28141278 is 87214182.

It is a happy number.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28141279) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 213126 + ... + 213257.

It is an arithmetic number, because the mean of its divisors is an integer number (3837456).

Almost surely, 2^28141278 is an apocalyptic number.

28141278 is an abundant number, since it is smaller than the sum of its proper divisors (33258018).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28141278 is a wasteful number, since it uses less digits than its factorization.

28141278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426399.

The product of its digits is 7168, while the sum is 33.

The square root of 28141278 is about 5304.8353414597. The cubic root of 28141278 is about 304.1687587354.

The spelling of 28141278 in words is "twenty-eight million, one hundred forty-one thousand, two hundred seventy-eight".