28445560 has 64 divisors (see below), whose sum is σ = 75206880. Its totient is φ = 9546240.

The previous prime is 28445537. The next prime is 28445623. The reversal of 28445560 is 6554482.

It is a congruent number.

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, 3234 + ... + 8206.

Almost surely, 2^28445560 is an apocalyptic number.

28445560 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 28445560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37603440).

28445560 is an abundant number, since it is smaller than the sum of its proper divisors (46761320).

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

28445560 is a wasteful number, since it uses less digits than its factorization.

28445560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5008 (or 5004 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 34.

The square root of 28445560 is about 5333.4379156413. The cubic root of 28445560 is about 305.2611218964.

The spelling of 28445560 in words is "twenty-eight million, four hundred forty-five thousand, five hundred sixty".