28078734202 has 8 divisors (see below), whose sum is σ = 42121912500. Its totient is φ = 14038096704.

The previous prime is 28078734197. The next prime is 28078734241. The reversal of 28078734202 is 20243787082.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 25648342801 + 2430391401 = 160151^2 + 49299^2 .

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, 607327 + ... + 651922.

Almost surely, 2^28078734202 is an apocalyptic number.

28078734202 is a deficient number, since it is larger than the sum of its proper divisors (14043178298).

28078734202 is a wasteful number, since it uses less digits than its factorization.

28078734202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1270400.

The product of its (nonzero) digits is 301056, while the sum is 43.

The spelling of 28078734202 in words is "twenty-eight billion, seventy-eight million, seven hundred thirty-four thousand, two hundred two".