28239300 has 72 divisors (see below), whose sum is σ = 90792800. Its totient is φ = 7529760.

The previous prime is 28239287. The next prime is 28239307. The reversal of 28239300 is 393282.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (28239307) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2530 + ... + 7929.

Almost surely, 2^28239300 is an apocalyptic number.

28239300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28239300 is an abundant number, since it is smaller than the sum of its proper divisors (62553500).

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

28239300 is a wasteful number, since it uses less digits than its factorization.

28239300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10482 (or 10469 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 28239300 is about 5314.0662397076. The cubic root of 28239300 is about 304.5215107714.

The spelling of 28239300 in words is "twenty-eight million, two hundred thirty-nine thousand, three hundred".