28317276 has 108 divisors (see below), whose sum is σ = 81011112. Its totient is φ = 8608032.

The previous prime is 28317251. The next prime is 28317283. The reversal of 28317276 is 67271382.

It is a tau number, because it is divible by the number of its divisors (108).

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

It is a self number, because there is not a number n which added to its sum of digits gives 28317276.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 341131 + ... + 341213.

Almost surely, 2^28317276 is an apocalyptic number.

28317276 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28317276, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40505556).

28317276 is an abundant number, since it is smaller than the sum of its proper divisors (52693836).

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

28317276 is an equidigital number, since it uses as much as digits as its factorization.

28317276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124 (or 101 counting only the distinct ones).

The product of its digits is 28224, while the sum is 36.

The square root of 28317276 is about 5321.3979366328. The cubic root of 28317276 is about 304.8015406953.

The spelling of 28317276 in words is "twenty-eight million, three hundred seventeen thousand, two hundred seventy-six".