28191910002002 has 8 divisors (see below), whose sum is σ = 42706556736012. Its totient is φ = 13956391090000.

The previous prime is 28191910001851. The next prime is 28191910002013. The reversal of 28191910002002 is 20020001919182.

It can be written as a sum of positive squares in 2 ways, for example, as 21929749092241 + 6262160909761 = 4682921^2 + 2502431^2 .

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, 69781955249 + ... + 69781955652.

Almost surely, 2^{28191910002002} is an apocalyptic number.

28191910002002 is a deficient number, since it is larger than the sum of its proper divisors (14514646734010).

28191910002002 is a wasteful number, since it uses less digits than its factorization.

28191910002002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139563911004.

The product of its (nonzero) digits is 5184, while the sum is 35.

The spelling of 28191910002002 in words is "twenty-eight trillion, one hundred ninety-one billion, nine hundred ten million, two thousand, two".