28318680 has 128 divisors (see below), whose sum is σ = 101707200. Its totient is φ = 6967296.

The previous prime is 28318673. The next prime is 28318699. The reversal of 28318680 is 8681382.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13032 + ... + 15048.

Almost surely, 2^28318680 is an apocalyptic number.

28318680 is a gapful number since it is divisible by the number (20) 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 28318680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50853600).

28318680 is an abundant number, since it is smaller than the sum of its proper divisors (73388520).

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

28318680 is a wasteful number, since it uses less digits than its factorization.

28318680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2050 (or 2040 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 28318680 is about 5321.5298552202. The cubic root of 28318680 is about 304.8065780712.

It can be divided in two parts, 2831 and 8680, that added together give a palindrome (11511).

The spelling of 28318680 in words is "twenty-eight million, three hundred eighteen thousand, six hundred eighty".