28951278 has 16 divisors (see below), whose sum is σ = 58416336. Its totient is φ = 9564800.

The previous prime is 28951277. The next prime is 28951291. The reversal of 28951278 is 87215982.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28951277) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20673 + ... + 22028.

It is an arithmetic number, because the mean of its divisors is an integer number (3651021).

Almost surely, 2^28951278 is an apocalyptic number.

28951278 is an abundant number, since it is smaller than the sum of its proper divisors (29465058).

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

28951278 is a wasteful number, since it uses less digits than its factorization.

28951278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42819.

The product of its digits is 80640, while the sum is 42.

The square root of 28951278 is about 5380.6391813613. The cubic root of 28951278 is about 307.0595293177.

The spelling of 28951278 in words is "twenty-eight million, nine hundred fifty-one thousand, two hundred seventy-eight".