28314278 has 8 divisors (see below), whose sum is σ = 42522168. Its totient is φ = 14140224.

The previous prime is 28314271. The next prime is 28314281. The reversal of 28314278 is 87241382.

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

It is a super-2 number, since 2×28314278² = 1603396677322568, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28314271) 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, 6251 + ... + 9782.

It is an arithmetic number, because the mean of its divisors is an integer number (5315271).

Almost surely, 2^28314278 is an apocalyptic number.

28314278 is a deficient number, since it is larger than the sum of its proper divisors (14207890).

28314278 is a wasteful number, since it uses less digits than its factorization.

28314278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16918.

The product of its digits is 21504, while the sum is 35.

The square root of 28314278 is about 5321.1162362798. The cubic root of 28314278 is about 304.7907836899.

The spelling of 28314278 in words is "twenty-eight million, three hundred fourteen thousand, two hundred seventy-eight".