28274020 has 24 divisors (see below), whose sum is σ = 59568768. Its totient is φ = 11272800.

The previous prime is 28274011. The next prime is 28274023. The reversal of 28274020 is 2047282.

It is not an unprimeable number, because it can be changed into a prime (28274023) 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, 4485 + ... + 8755.

It is an arithmetic number, because the mean of its divisors is an integer number (2482032).

Almost surely, 2^28274020 is an apocalyptic number.

28274020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28274020 is an abundant number, since it is smaller than the sum of its proper divisors (31294748).

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

28274020 is a wasteful number, since it uses less digits than its factorization.

28274020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4611 (or 4609 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 25.

The square root of 28274020 is about 5317.3320377798. The cubic root of 28274020 is about 304.6462619359.

The spelling of 28274020 in words is "twenty-eight million, two hundred seventy-four thousand, twenty".