28734020 has 48 divisors (see below), whose sum is σ = 69431040. Its totient is φ = 9784704.

The previous prime is 28733987. The next prime is 28734031. The reversal of 28734020 is 2043782.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22766 + ... + 23994.

It is an arithmetic number, because the mean of its divisors is an integer number (1446480).

Almost surely, 2^28734020 is an apocalyptic number.

28734020 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 28734020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34715520).

28734020 is an abundant number, since it is smaller than the sum of its proper divisors (40697020).

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

28734020 is a wasteful number, since it uses less digits than its factorization.

28734020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1412 (or 1410 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 28734020 is about 5360.4122975756. The cubic root of 28734020 is about 306.2895148235.

The spelling of 28734020 in words is "twenty-eight million, seven hundred thirty-four thousand, twenty".