28506320585746 has 4 divisors (see below), whose sum is σ = 42759480878622. Its totient is φ = 14253160292872.

The previous prime is 28506320585641. The next prime is 28506320585761. The reversal of 28506320585746 is 64758502360582.

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

It can be written as a sum of positive squares in only one way, i.e., 28498888249225 + 7432336521 = 5338435^2 + 86211^2 .

It is a super-2 number, since 2×28506320585746² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7126580146435 + ... + 7126580146438.

Almost surely, 2^{28506320585746} is an apocalyptic number.

28506320585746 is a deficient number, since it is larger than the sum of its proper divisors (14253160292876).

28506320585746 is a wasteful number, since it uses less digits than its factorization.

28506320585746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14253160292875.

The product of its (nonzero) digits is 96768000, while the sum is 61.

The spelling of 28506320585746 in words is "twenty-eight trillion, five hundred six billion, three hundred twenty million, five hundred eighty-five thousand, seven hundred forty-six".