28889000 has 64 divisors (see below), whose sum is σ = 77276160. Its totient is φ = 9902400.

The previous prime is 28888997. The next prime is 28889009. The reversal of 28889000 is 98882.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is not an unprimeable number, because it can be changed into a prime (28889009) 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, 4937 + ... + 9063.

It is an arithmetic number, because the mean of its divisors is an integer number (1207440).

Almost surely, 2^28889000 is an apocalyptic number.

28889000 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 28889000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38638080).

28889000 is an abundant number, since it is smaller than the sum of its proper divisors (48387160).

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

28889000 is a wasteful number, since it uses less digits than its factorization.

28889000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4155 (or 4141 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 35.

The square root of 28889000 is about 5374.8488350836. The cubic root of 28889000 is about 306.8391961331.

The spelling of 28889000 in words is "twenty-eight million, eight hundred eighty-nine thousand".