28109352 has 32 divisors (see below), whose sum is σ = 72698400. Its totient is φ = 9046464.

The previous prime is 28109327. The next prime is 28109357. The reversal of 28109352 is 25390182.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (28109357) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19498 + ... + 20889.

It is an arithmetic number, because the mean of its divisors is an integer number (2271825).

Almost surely, 2^28109352 is an apocalyptic number.

It is an amenable number.

28109352 is an abundant number, since it is smaller than the sum of its proper divisors (44589048).

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

28109352 is a wasteful number, since it uses less digits than its factorization.

28109352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40425 (or 40421 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 28109352 is about 5301.8253460483. The cubic root of 28109352 is about 304.0536897324.

The spelling of 28109352 in words is "twenty-eight million, one hundred nine thousand, three hundred fifty-two".