28278902 has 8 divisors (see below), whose sum is σ = 42484512. Its totient is φ = 14117400.

The previous prime is 28278893. The next prime is 28278911. The reversal of 28278902 is 20987282.

It is an interprime number because it is at equal distance from previous prime (28278893) and next prime (28278911).

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, 9374 + ... + 12017.

It is an arithmetic number, because the mean of its divisors is an integer number (5310564).

Almost surely, 2^28278902 is an apocalyptic number.

28278902 is a deficient number, since it is larger than the sum of its proper divisors (14205610).

28278902 is a wasteful number, since it uses less digits than its factorization.

28278902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22054.

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 28278902 is about 5317.7910827711. The cubic root of 28278902 is about 304.6637950806.

The spelling of 28278902 in words is "twenty-eight million, two hundred seventy-eight thousand, nine hundred two".