28672077645 has 24 divisors (see below), whose sum is σ = 49727652000. Its totient is φ = 15282733536.

The previous prime is 28672077631. The next prime is 28672077673. The reversal of 28672077645 is 54677027682.

It is not a de Polignac number, because 28672077645 - 2¹⁷ = 28671946573 is a prime.

It is a super-3 number, since 3×28672077645³ (a number of 32 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28672077591 and 28672077600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 111055 + ... + 263964.

It is an arithmetic number, because the mean of its divisors is an integer number (2071985500).

Almost surely, 2^28672077645 is an apocalyptic number.

It is an amenable number.

28672077645 is a deficient number, since it is larger than the sum of its proper divisors (21055574355).

28672077645 is a wasteful number, since it uses less digits than its factorization.

28672077645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376729 (or 376726 counting only the distinct ones).

The product of its (nonzero) digits is 7902720, while the sum is 54.

The spelling of 28672077645 in words is "twenty-eight billion, six hundred seventy-two million, seventy-seven thousand, six hundred forty-five".