28278054 has 24 divisors (see below), whose sum is σ = 70022160. Its totient is φ = 8079408.

The previous prime is 28278049. The next prime is 28278073. The reversal of 28278054 is 45087282.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 112089 + ... + 112340.

It is an arithmetic number, because the mean of its divisors is an integer number (2917590).

Almost surely, 2^28278054 is an apocalyptic number.

28278054 is an abundant number, since it is smaller than the sum of its proper divisors (41744106).

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

28278054 is a wasteful number, since it uses less digits than its factorization.

28278054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224444 (or 224441 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 36.

The square root of 28278054 is about 5317.7113498196. The cubic root of 28278054 is about 304.6607497304.

The spelling of 28278054 in words is "twenty-eight million, two hundred seventy-eight thousand, fifty-four".