28317080 has 64 divisors (see below), whose sum is σ = 70156800. Its totient is φ = 10200960.

The previous prime is 28317017. The next prime is 28317119. The reversal of 28317080 is 8071382.

28317080 = 555² + 556² + ... + 634².

It is a congruent number.

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, 60929 + ... + 61391.

It is an arithmetic number, because the mean of its divisors is an integer number (1096200).

Almost surely, 2^28317080 is an apocalyptic number.

28317080 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 28317080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35078400).

28317080 is an abundant number, since it is smaller than the sum of its proper divisors (41839720).

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

28317080 is a wasteful number, since it uses less digits than its factorization.

28317080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 624 (or 620 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 28317080 is about 5321.3795203875. The cubic root of 28317080 is about 304.8008374586.

The spelling of 28317080 in words is "twenty-eight million, three hundred seventeen thousand, eighty".