28873900 has 36 divisors (see below), whose sum is σ = 68355000. Its totient is φ = 10499200.

The previous prime is 28873877. The next prime is 28873903. The reversal of 28873900 is 937882.

It is a self number, because there is not a number n which added to its sum of digits gives 28873900.

It is not an unprimeable number, because it can be changed into a prime (28873903) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12025 + ... + 14224.

It is an arithmetic number, because the mean of its divisors is an integer number (1898750).

Almost surely, 2^28873900 is an apocalyptic number.

28873900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28873900 is an abundant number, since it is smaller than the sum of its proper divisors (39481100).

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

28873900 is a wasteful number, since it uses less digits than its factorization.

28873900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26274 (or 26267 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 28873900 is about 5373.4439608132. The cubic root of 28873900 is about 306.7857261924.

The spelling of 28873900 in words is "twenty-eight million, eight hundred seventy-three thousand, nine hundred".