28190002 has 8 divisors (see below), whose sum is σ = 42342300. Its totient is φ = 14075904.

The previous prime is 28189981. The next prime is 28190017. The reversal of 28190002 is 20009182.

It can be written as a sum of positive squares in 2 ways, for example, as 28100601 + 89401 = 5301^2 + 299^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 7627 + ... + 10702.

Almost surely, 2^28190002 is an apocalyptic number.

28190002 is a deficient number, since it is larger than the sum of its proper divisors (14152298).

28190002 is a wasteful number, since it uses less digits than its factorization.

28190002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19100.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 28190002 is about 5309.4257693276. The cubic root of 28190002 is about 304.3442041373.

Adding to 28190002 its reverse (20009182), we get a palindrome (48199184).

The spelling of 28190002 in words is "twenty-eight million, one hundred ninety thousand, two".