28010871 has 24 divisors (see below), whose sum is σ = 47118240. Its totient is φ = 15702336.

The previous prime is 28010869. The next prime is 28010893. The reversal of 28010871 is 17801082.

It is not a de Polignac number, because 28010871 - 2¹ = 28010869 is a prime.

It is a super-4 number, since 4×28010871⁴ (a number of 31 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28010371) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 856 + ... + 7533.

It is an arithmetic number, because the mean of its divisors is an integer number (1963260).

Almost surely, 2^28010871 is an apocalyptic number.

28010871 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

28010871 is a deficient number, since it is larger than the sum of its proper divisors (19107369).

28010871 is a wasteful number, since it uses less digits than its factorization.

28010871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8455 (or 8452 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 27.

The square root of 28010871 is about 5292.5297353912. The cubic root of 28010871 is about 303.6981906251.

The spelling of 28010871 in words is "twenty-eight million, ten thousand, eight hundred seventy-one".