28415488 has 80 divisors (see below), whose sum is σ = 62853120. Its totient is φ = 12773376.

The previous prime is 28415479. The next prime is 28415489. The reversal of 28415488 is 88451482.

It is a self number, because there is not a number n which added to its sum of digits gives 28415488.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28415489) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 223681 + ... + 223807.

It is an arithmetic number, because the mean of its divisors is an integer number (785664).

Almost surely, 2^28415488 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28415488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31426560).

28415488 is an abundant number, since it is smaller than the sum of its proper divisors (34437632).

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

28415488 is a wasteful number, since it uses less digits than its factorization.

28415488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187 (or 171 counting only the distinct ones).

The product of its digits is 81920, while the sum is 40.

The square root of 28415488 is about 5330.6179754321. The cubic root of 28415488 is about 305.1535122583.

The spelling of 28415488 in words is "twenty-eight million, four hundred fifteen thousand, four hundred eighty-eight".