28000867671 has 96 divisors (see below), whose sum is σ = 51501588480. Its totient is φ = 14939188992.

The previous prime is 28000867651. The next prime is 28000867673. The reversal of 28000867671 is 17676800082.

It is not a de Polignac number, because 28000867671 - 2¹⁴ = 28000851287 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28000867673) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2851456 + ... + 2861258.

It is an arithmetic number, because the mean of its divisors is an integer number (536474880).

Almost surely, 2^28000867671 is an apocalyptic number.

28000867671 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

28000867671 is a deficient number, since it is larger than the sum of its proper divisors (23500720809).

28000867671 is a wasteful number, since it uses less digits than its factorization.

28000867671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9970 (or 9957 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 45.

The spelling of 28000867671 in words is "twenty-eight billion, eight hundred sixty-seven thousand, six hundred seventy-one".