28793388 has 48 divisors (see below), whose sum is σ = 72692480. Its totient is φ = 8817984.

The previous prime is 28793381. The next prime is 28793419. The reversal of 28793388 is 88339782.

It is not an unprimeable number, because it can be changed into a prime (28793381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58881 + ... + 59367.

Almost surely, 2^28793388 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28793388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36346240).

28793388 is an abundant number, since it is smaller than the sum of its proper divisors (43899092).

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

28793388 is a wasteful number, since it uses less digits than its factorization.

28793388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 886 (or 884 counting only the distinct ones).

The product of its digits is 580608, while the sum is 48.

The square root of 28793388 is about 5365.9470739097. The cubic root of 28793388 is about 306.5003135789.

The spelling of 28793388 in words is "twenty-eight million, seven hundred ninety-three thousand, three hundred eighty-eight".