28438080 has 112 divisors (see below), whose sum is σ = 98535744. Its totient is φ = 6891520.

The previous prime is 28438063. The next prime is 28438103. The reversal of 28438080 is 8083482.

It is a Harshad number since it is a multiple of its sum of digits (33).

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, 9214 + ... + 11906.

Almost surely, 2^28438080 is an apocalyptic number.

28438080 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 28438080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49267872).

28438080 is an abundant number, since it is smaller than the sum of its proper divisors (70097664).

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

28438080 is a wasteful number, since it uses less digits than its factorization.

28438080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2724 (or 2714 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 33.

The square root of 28438080 is about 5332.7366332869. The cubic root of 28438080 is about 305.2343625549.

The spelling of 28438080 in words is "twenty-eight million, four hundred thirty-eight thousand, eighty".