28871208 has 64 divisors (see below), whose sum is σ = 81340800. Its totient is φ = 9486720.

The previous prime is 28871197. The next prime is 28871231. The reversal of 28871208 is 80217882.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 14853 + ... + 16683.

It is an arithmetic number, because the mean of its divisors is an integer number (1270950).

Almost surely, 2^28871208 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28871208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40670400).

28871208 is an abundant number, since it is smaller than the sum of its proper divisors (52469592).

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

28871208 is a wasteful number, since it uses less digits than its factorization.

28871208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1919 (or 1909 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 36.

The square root of 28871208 is about 5373.1934638537. The cubic root of 28871208 is about 306.7761917127.

It can be divided in two parts, 2887 and 1208, that added together give a triangular number (4095 = T₉₀).

The spelling of 28871208 in words is "twenty-eight million, eight hundred seventy-one thousand, two hundred eight".