28114278 has 8 divisors (see below), whose sum is σ = 56228568. Its totient is φ = 9371424.

The previous prime is 28114231. The next prime is 28114291. The reversal of 28114278 is 87241182.

It is a happy number.

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

28114278 is an admirable number.

It is a super-2 number, since 2×28114278² = 1580825254922568, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2342851 + ... + 2342862.

It is an arithmetic number, because the mean of its divisors is an integer number (7028571).

Almost surely, 2^28114278 is an apocalyptic number.

28114278 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

28114278 is a wasteful number, since it uses less digits than its factorization.

28114278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4685718.

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

The square root of 28114278 is about 5302.2898826828. The cubic root of 28114278 is about 304.0714499069.

The spelling of 28114278 in words is "twenty-eight million, one hundred fourteen thousand, two hundred seventy-eight".