28933900 has 36 divisors (see below), whose sum is σ = 63511560. Its totient is φ = 11440000.

The previous prime is 28933867. The next prime is 28933939. The reversal of 28933900 is 933982.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7275 + ... + 10525.

It is an arithmetic number, because the mean of its divisors is an integer number (1764210).

Almost surely, 2^28933900 is an apocalyptic number.

28933900 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 28933900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31755780).

28933900 is an abundant number, since it is smaller than the sum of its proper divisors (34577660).

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

28933900 is a wasteful number, since it uses less digits than its factorization.

28933900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3354 (or 3347 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 28933900 is about 5379.0240750530. The cubic root of 28933900 is about 306.9980795432.

The spelling of 28933900 in words is "twenty-eight million, nine hundred thirty-three thousand, nine hundred".