28109348 has 12 divisors (see below), whose sum is σ = 49232652. Its totient is φ = 14042880.

The previous prime is 28109327. The next prime is 28109357. The reversal of 28109348 is 84390182.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 20502784 + 7606564 = 4528^2 + 2758^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4508 + ... + 8748.

It is an arithmetic number, because the mean of its divisors is an integer number (4102721).

Almost surely, 2^28109348 is an apocalyptic number.

It is an amenable number.

28109348 is a deficient number, since it is larger than the sum of its proper divisors (21123304).

28109348 is a wasteful number, since it uses less digits than its factorization.

28109348 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5902 (or 5900 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 28109348 is about 5301.8249688197. The cubic root of 28109348 is about 304.0536753100.

The spelling of 28109348 in words is "twenty-eight million, one hundred nine thousand, three hundred forty-eight".