28032340 has 24 divisors (see below), whose sum is σ = 67277952. Its totient is φ = 9611040.

The previous prime is 28032317. The next prime is 28032343. The reversal of 28032340 is 4323082.

It is a hoax number, since the sum of its digits (22) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28032343) 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, 99976 + ... + 100255.

It is an arithmetic number, because the mean of its divisors is an integer number (2803248).

Almost surely, 2^28032340 is an apocalyptic number.

28032340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28032340 is an abundant number, since it is smaller than the sum of its proper divisors (39245612).

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

28032340 is a wasteful number, since it uses less digits than its factorization.

28032340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200247 (or 200245 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 28032340 is about 5294.5575830281. The cubic root of 28032340 is about 303.7757608820.

The spelling of 28032340 in words is "twenty-eight million, thirty-two thousand, three hundred forty".