28773278 has 32 divisors (see below), whose sum is σ = 46569600. Its totient is φ = 13307616.

The previous prime is 28773257. The next prime is 28773281. The reversal of 28773278 is 87237782.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 206933 + ... + 207071.

It is an arithmetic number, because the mean of its divisors is an integer number (1455300).

Almost surely, 2^28773278 is an apocalyptic number.

28773278 is a deficient number, since it is larger than the sum of its proper divisors (17796322).

28773278 is a wasteful number, since it uses less digits than its factorization.

28773278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296.

The product of its digits is 263424, while the sum is 44.

The square root of 28773278 is about 5364.0728928679. The cubic root of 28773278 is about 306.4289412112.

The spelling of 28773278 in words is "twenty-eight million, seven hundred seventy-three thousand, two hundred seventy-eight".