28072985702 has 4 divisors (see below), whose sum is σ = 42109478556. Its totient is φ = 14036492850.

The previous prime is 28072985701. The next prime is 28072985711. The reversal of 28072985702 is 20758927082.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28072985701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7018246424 + ... + 7018246427.

It is an arithmetic number, because the mean of its divisors is an integer number (10527369639).

Almost surely, 2^28072985702 is an apocalyptic number.

28072985702 is a deficient number, since it is larger than the sum of its proper divisors (14036492854).

28072985702 is a wasteful number, since it uses less digits than its factorization.

28072985702 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14036492853.

The product of its (nonzero) digits is 1128960, while the sum is 50.

The spelling of 28072985702 in words is "twenty-eight billion, seventy-two million, nine hundred eighty-five thousand, seven hundred two".