28275480 has 96 divisors (see below), whose sum is σ = 95331600. Its totient is φ = 7537536.

The previous prime is 28275479. The next prime is 28275491. The reversal of 28275480 is 8457282.

It is a happy number.

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 23 ways as a sum of consecutive naturals, for example, 8266 + ... + 11174.

Almost surely, 2^28275480 is an apocalyptic number.

28275480 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 28275480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47665800).

28275480 is an abundant number, since it is smaller than the sum of its proper divisors (67056120).

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

28275480 is a wasteful number, since it uses less digits than its factorization.

28275480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2935 (or 2919 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 36.

The square root of 28275480 is about 5317.4693229016. The cubic root of 28275480 is about 304.6515055704.

The spelling of 28275480 in words is "twenty-eight million, two hundred seventy-five thousand, four hundred eighty".