28344576 has 144 divisors (see below), whose sum is σ = 86534784. Its totient is φ = 8159232.

The previous prime is 28344521. The next prime is 28344587. The reversal of 28344576 is 67544382.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (39).

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, 169645 + ... + 169811.

It is an arithmetic number, because the mean of its divisors is an integer number (600936).

Almost surely, 2^28344576 is an apocalyptic number.

28344576 is a gapful number since it is divisible by the number (26) 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 28344576, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43267392).

28344576 is an abundant number, since it is smaller than the sum of its proper divisors (58190208).

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

28344576 is a wasteful number, since it uses less digits than its factorization.

28344576 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216 (or 202 counting only the distinct ones).

The product of its digits is 161280, while the sum is 39.

The square root of 28344576 is about 5323.9624341274. The cubic root of 28344576 is about 304.8994598294.

It can be divided in two parts, 28344 and 576, that added together give a triangular number (28920 = T₂₄₀).

The spelling of 28344576 in words is "twenty-eight million, three hundred forty-four thousand, five hundred seventy-six".