28876320 has 144 divisors (see below), whose sum is σ = 107557632. Its totient is φ = 6996480.

The previous prime is 28876307. The next prime is 28876327. The reversal of 28876320 is 2367882.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (28876327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14929 + ... + 16751.

It is an arithmetic number, because the mean of its divisors is an integer number (746928).

Almost surely, 2^28876320 is an apocalyptic number.

28876320 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 28876320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53778816).

28876320 is an abundant number, since it is smaller than the sum of its proper divisors (78681312).

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

28876320 is a wasteful number, since it uses less digits than its factorization.

28876320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1855 (or 1844 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 28876320 is about 5373.6691375633. The cubic root of 28876320 is about 306.7942968013.

The spelling of 28876320 in words is "twenty-eight million, eight hundred seventy-six thousand, three hundred twenty".