28277235 has 64 divisors (see below), whose sum is σ = 59996160. Its totient is φ = 12355200.

The previous prime is 28277231. The next prime is 28277243. The reversal of 28277235 is 53277282.

It is a happy number.

It is not a de Polignac number, because 28277235 - 2² = 28277231 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28277235.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28277231) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 21085 + ... + 22385.

It is an arithmetic number, because the mean of its divisors is an integer number (937440).

Almost surely, 2^28277235 is an apocalyptic number.

28277235 is an abundant number, since it is smaller than the sum of its proper divisors (31718925).

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

28277235 is a wasteful number, since it uses less digits than its factorization.

28277235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1345 (or 1339 counting only the distinct ones).

The product of its digits is 47040, while the sum is 36.

The square root of 28277235 is about 5317.6343424497. The cubic root of 28277235 is about 304.6578084676.

The spelling of 28277235 in words is "twenty-eight million, two hundred seventy-seven thousand, two hundred thirty-five".