28887474 has 64 divisors (see below), whose sum is σ = 74391552. Its totient is φ = 7257600.

The previous prime is 28887457. The next prime is 28887479. The reversal of 28887474 is 47478882.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (28887479) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 13314 + ... + 15330.

It is an arithmetic number, because the mean of its divisors is an integer number (1162368).

Almost surely, 2^28887474 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28887474, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37195776).

28887474 is an abundant number, since it is smaller than the sum of its proper divisors (45504078).

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

28887474 is a wasteful number, since it uses less digits than its factorization.

28887474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2071.

The product of its digits is 802816, while the sum is 48.

The square root of 28887474 is about 5374.7068757282. The cubic root of 28887474 is about 306.8337933286.

The spelling of 28887474 in words is "twenty-eight million, eight hundred eighty-seven thousand, four hundred seventy-four".