28278754 has 8 divisors (see below), whose sum is σ = 48477888. Its totient is φ = 12119460.

The previous prime is 28278751. The next prime is 28278763. The reversal of 28278754 is 45787282.

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

It is a self number, because there is not a number n which added to its sum of digits gives 28278754.

It is not an unprimeable number, because it can be changed into a prime (28278751) 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, 1009942 + ... + 1009969.

It is an arithmetic number, because the mean of its divisors is an integer number (6059736).

Almost surely, 2^28278754 is an apocalyptic number.

28278754 is a deficient number, since it is larger than the sum of its proper divisors (20199134).

28278754 is a wasteful number, since it uses less digits than its factorization.

28278754 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2019920.

The product of its digits is 250880, while the sum is 43.

The square root of 28278754 is about 5317.7771672006. Note that the first 3 decimals coincide. The cubic root of 28278754 is about 304.6632635852.

The spelling of 28278754 in words is "twenty-eight million, two hundred seventy-eight thousand, seven hundred fifty-four".