28734888 has 128 divisors (see below), whose sum is σ = 90316800. Its totient is φ = 7416576.

The previous prime is 28734887. The next prime is 28734919. The reversal of 28734888 is 88843782.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (28734887) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 128745 + ... + 128967.

It is an arithmetic number, because the mean of its divisors is an integer number (705600).

Almost surely, 2^28734888 is an apocalyptic number.

28734888 is a gapful number since it is divisible by the number (28) 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 28734888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45158400).

28734888 is an abundant number, since it is smaller than the sum of its proper divisors (61581912).

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

28734888 is a wasteful number, since it uses less digits than its factorization.

28734888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311 (or 307 counting only the distinct ones).

The product of its digits is 688128, while the sum is 48.

The square root of 28734888 is about 5360.4932608856. The cubic root of 28734888 is about 306.2925989334.

The spelling of 28734888 in words is "twenty-eight million, seven hundred thirty-four thousand, eight hundred eighty-eight".