28108080 has 480 divisors, whose sum is σ = 130705920. Its totient is φ = 5391360.

The previous prime is 28108063. The next prime is 28108081. The reversal of 28108080 is 8080182.

It is a super-2 number, since 2×28108080² = 1580128322572800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28108081) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2162154 + ... + 2162166.

It is an arithmetic number, because the mean of its divisors is an integer number (272304).

Almost surely, 2^28108080 is an apocalyptic number.

28108080 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 28108080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65352960).

28108080 is an abundant number, since it is smaller than the sum of its proper divisors (102597840).

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

28108080 is a wasteful number, since it uses less digits than its factorization.

28108080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66 (or 41 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 27.

The square root of 28108080 is about 5301.7053860055. The cubic root of 28108080 is about 304.0491033332.

The spelling of 28108080 in words is "twenty-eight million, one hundred eight thousand, eighty".