28839100 has 36 divisors (see below), whose sum is σ = 62980344. Its totient is φ = 11462080.

The previous prime is 28839071. The next prime is 28839103. The reversal of 28839100 is 193882.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28839103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16467 + ... + 18133.

It is an arithmetic number, because the mean of its divisors is an integer number (1749454).

Almost surely, 2^28839100 is an apocalyptic number.

28839100 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 28839100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31490172).

28839100 is an abundant number, since it is smaller than the sum of its proper divisors (34141244).

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

28839100 is a wasteful number, since it uses less digits than its factorization.

28839100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1854 (or 1847 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 28839100 is about 5370.2048378065. The cubic root of 28839100 is about 306.6624264274.

The spelling of 28839100 in words is "twenty-eight million, eight hundred thirty-nine thousand, one hundred".