28867278 has 32 divisors (see below), whose sum is σ = 63250560. Its totient is φ = 8710560.

The previous prime is 28867273. The next prime is 28867283. The reversal of 28867278 is 87276882.

It is an interprime number because it is at equal distance from previous prime (28867273) and next prime (28867283).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28867271) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17493 + ... + 19071.

It is an arithmetic number, because the mean of its divisors is an integer number (1976580).

Almost surely, 2^28867278 is an apocalyptic number.

28867278 is an abundant number, since it is smaller than the sum of its proper divisors (34383282).

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

28867278 is a wasteful number, since it uses less digits than its factorization.

28867278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1872.

The product of its digits is 602112, while the sum is 48.

The square root of 28867278 is about 5372.8277470993. The cubic root of 28867278 is about 306.7622714414.

The spelling of 28867278 in words is "twenty-eight million, eight hundred sixty-seven thousand, two hundred seventy-eight".