28903000 has 64 divisors (see below), whose sum is σ = 77313600. Its totient is φ = 9907200.

The previous prime is 28902989. The next prime is 28903001. The reversal of 28903000 is 30982.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28903001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4936 + ... + 9064.

It is an arithmetic number, because the mean of its divisors is an integer number (1208025).

Almost surely, 2^28903000 is an apocalyptic number.

28903000 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 28903000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38656800).

28903000 is an abundant number, since it is smaller than the sum of its proper divisors (48410600).

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

28903000 is a wasteful number, since it uses less digits than its factorization.

28903000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4157 (or 4143 counting only the distinct ones).

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

The square root of 28903000 is about 5376.1510395449. The cubic root of 28903000 is about 306.8887542695. Note that the first 3 decimals are identical.

Adding to 28903000 its reverse (30982), we get a palindrome (28933982).

The spelling of 28903000 in words is "twenty-eight million, nine hundred three thousand".