28070591722 has 4 divisors (see below), whose sum is σ = 42105887586. Its totient is φ = 14035295860.

The previous prime is 28070591711. The next prime is 28070591741. The reversal of 28070591722 is 22719507082.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22719507082 = 2 ⋅11359753541.

It can be written as a sum of positive squares in only one way, i.e., 25360244001 + 2710347721 = 159249^2 + 52061^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7017647929 + ... + 7017647932.

Almost surely, 2^28070591722 is an apocalyptic number.

28070591722 is a deficient number, since it is larger than the sum of its proper divisors (14035295864).

28070591722 is a wasteful number, since it uses less digits than its factorization.

28070591722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14035295863.

The product of its (nonzero) digits is 141120, while the sum is 43.

The spelling of 28070591722 in words is "twenty-eight billion, seventy million, five hundred ninety-one thousand, seven hundred twenty-two".