28823240 has 32 divisors (see below), whose sum is σ = 65033280. Its totient is φ = 11497152.

The previous prime is 28823227. The next prime is 28823243. The reversal of 28823240 is 4232882.

It is not an unprimeable number, because it can be changed into a prime (28823243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17909 + ... + 19451.

It is an arithmetic number, because the mean of its divisors is an integer number (2032290).

Almost surely, 2^28823240 is an apocalyptic number.

28823240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28823240 is an abundant number, since it is smaller than the sum of its proper divisors (36210040).

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

28823240 is a wasteful number, since it uses less digits than its factorization.

28823240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2021 (or 2017 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 29.

The square root of 28823240 is about 5368.7279685229. The cubic root of 28823240 is about 306.6062000086.

The spelling of 28823240 in words is "twenty-eight million, eight hundred twenty-three thousand, two hundred forty".