28347286 has 8 divisors (see below), whose sum is σ = 46386504. Its totient is φ = 12885120.

The previous prime is 28347283. The next prime is 28347307. The reversal of 28347286 is 68274382.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28347281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 644235 + ... + 644278.

It is an arithmetic number, because the mean of its divisors is an integer number (5798313).

Almost surely, 2^28347286 is an apocalyptic number.

28347286 is a deficient number, since it is larger than the sum of its proper divisors (18039218).

28347286 is a wasteful number, since it uses less digits than its factorization.

28347286 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1288526.

The product of its digits is 129024, while the sum is 40.

The square root of 28347286 is about 5324.2169377290. The cubic root of 28347286 is about 304.9091765762.

The spelling of 28347286 in words is "twenty-eight million, three hundred forty-seven thousand, two hundred eighty-six".