28582240 has 24 divisors (see below), whose sum is σ = 67525920. Its totient is φ = 11432832.

The previous prime is 28582237. The next prime is 28582243. The reversal of 28582240 is 4228582.

It is an interprime number because it is at equal distance from previous prime (28582237) and next prime (28582243).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28582243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89160 + ... + 89479.

It is an arithmetic number, because the mean of its divisors is an integer number (2813580).

Almost surely, 2^28582240 is an apocalyptic number.

28582240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28582240 is an abundant number, since it is smaller than the sum of its proper divisors (38943680).

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

28582240 is a wasteful number, since it uses less digits than its factorization.

28582240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178654 (or 178646 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 31.

The square root of 28582240 is about 5346.2360591354. The cubic root of 28582240 is about 305.7492641809.

The spelling of 28582240 in words is "twenty-eight million, five hundred eighty-two thousand, two hundred forty".