28065307677 has 16 divisors (see below), whose sum is σ = 40914436608. Its totient is φ = 16970872880.

The previous prime is 28065307657. The next prime is 28065307681. The reversal of 28065307677 is 77670356082.

It is a cyclic number.

It is not a de Polignac number, because 28065307677 - 2⁸ = 28065307421 is a prime.

It is a super-2 number, since 2×28065307677² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28065307657) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 945273 + ... + 974510.

It is an arithmetic number, because the mean of its divisors is an integer number (2557152288).

Almost surely, 2^28065307677 is an apocalyptic number.

It is an amenable number.

28065307677 is a deficient number, since it is larger than the sum of its proper divisors (12849128931).

28065307677 is a wasteful number, since it uses less digits than its factorization.

28065307677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1920240.

The product of its (nonzero) digits is 2963520, while the sum is 51.

The spelling of 28065307677 in words is "twenty-eight billion, sixty-five million, three hundred seven thousand, six hundred seventy-seven".