28039000 has 64 divisors (see below), whose sum is σ = 71604000. Its totient is φ = 10192000.

The previous prime is 28038979. The next prime is 28039013. The reversal of 28039000 is 93082.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

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, 9726 + ... + 12274.

Almost surely, 2^28039000 is an apocalyptic number.

28039000 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 28039000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35802000).

28039000 is an abundant number, since it is smaller than the sum of its proper divisors (43565000).

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

28039000 is a wasteful number, since it uses less digits than its factorization.

28039000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2581 (or 2567 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 28039000 is about 5295.1864934108. The cubic root of 28039000 is about 303.7998162691.

The spelling of 28039000 in words is "twenty-eight million, thirty-nine thousand".