28590320 has 80 divisors (see below), whose sum is σ = 74004192. Its totient is φ = 10183680.

The previous prime is 28590319. The next prime is 28590323. The reversal of 28590320 is 2309582.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28590323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46334 + ... + 46946.

Almost surely, 2^28590320 is an apocalyptic number.

28590320 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 28590320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37002096).

28590320 is an abundant number, since it is smaller than the sum of its proper divisors (45413872).

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

28590320 is a wasteful number, since it uses less digits than its factorization.

28590320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 690 (or 684 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 28590320 is about 5346.9916775697. The cubic root of 28590320 is about 305.7780725283.

The spelling of 28590320 in words is "twenty-eight million, five hundred ninety thousand, three hundred twenty".