28352278 has 8 divisors (see below), whose sum is σ = 42774768. Its totient is φ = 14094024.

The previous prime is 28352263. The next prime is 28352309. The reversal of 28352278 is 87225382.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40626 + ... + 41317.

It is an arithmetic number, because the mean of its divisors is an integer number (5346846).

Almost surely, 2^28352278 is an apocalyptic number.

28352278 is a deficient number, since it is larger than the sum of its proper divisors (14422490).

28352278 is a wasteful number, since it uses less digits than its factorization.

28352278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82118.

The product of its digits is 53760, while the sum is 37.

The square root of 28352278 is about 5324.6857184251. The cubic root of 28352278 is about 304.9270738483.

The spelling of 28352278 in words is "twenty-eight million, three hundred fifty-two thousand, two hundred seventy-eight".