28620386635 has 16 divisors (see below), whose sum is σ = 37050859296. Its totient is φ = 21142870528.

The previous prime is 28620386617. The next prime is 28620386647. The reversal of 28620386635 is 53668302682.

It is a cyclic number.

It is not a de Polignac number, because 28620386635 - 2²⁹ = 28083515723 is a prime.

It is a super-2 number, since 2×28620386635² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3172009 + ... + 3181018.

It is an arithmetic number, because the mean of its divisors is an integer number (2315678706).

Almost surely, 2^28620386635 is an apocalyptic number.

28620386635 is a deficient number, since it is larger than the sum of its proper divisors (8430472661).

28620386635 is a wasteful number, since it uses less digits than its factorization.

28620386635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6353102.

The product of its (nonzero) digits is 2488320, while the sum is 49.

The spelling of 28620386635 in words is "twenty-eight billion, six hundred twenty million, three hundred eighty-six thousand, six hundred thirty-five".