28207871656672 has 24 divisors (see below), whose sum is σ = 57948779817936. Its totient is φ = 13490721226752.

The previous prime is 28207871656637. The next prime is 28207871656751. The reversal of 28207871656672 is 27665617870282.

It is a super-3 number, since 3×28207871656672³ (a number of 41 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (67) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 28207871656598 and 28207871656607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19162955553 + ... + 19162957024.

It is an arithmetic number, because the mean of its divisors is an integer number (2414532492414).

Almost surely, 2^{28207871656672} is an apocalyptic number.

It is an amenable number.

28207871656672 is an abundant number, since it is smaller than the sum of its proper divisors (29740908161264).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28207871656672 is a wasteful number, since it uses less digits than its factorization.

28207871656672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38325912610 (or 38325912602 counting only the distinct ones).

The product of its (nonzero) digits is 189665280, while the sum is 67.

The spelling of 28207871656672 in words is "twenty-eight trillion, two hundred seven billion, eight hundred seventy-one million, six hundred fifty-six thousand, six hundred seventy-two".