28544460 has 192 divisors, whose sum is σ = 99456000. Its totient is φ = 6096384.

The previous prime is 28544443. The next prime is 28544471. The reversal of 28544460 is 6444582.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 390984 + ... + 391056.

It is an arithmetic number, because the mean of its divisors is an integer number (518000).

Almost surely, 2^28544460 is an apocalyptic number.

28544460 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 28544460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49728000).

28544460 is an abundant number, since it is smaller than the sum of its proper divisors (70911540).

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

28544460 is a wasteful number, since it uses less digits than its factorization.

28544460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125 (or 109 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 33.

The square root of 28544460 is about 5342.7015638158. The cubic root of 28544460 is about 305.6144916741.

The spelling of 28544460 in words is "twenty-eight million, five hundred forty-four thousand, four hundred sixty".