28470871 has 16 divisors (see below), whose sum is σ = 34358688. Its totient is φ = 23241600.

The previous prime is 28470857. The next prime is 28470887. The reversal of 28470871 is 17807482.

It is a cyclic number.

It is not a de Polignac number, because 28470871 - 2⁵ = 28470839 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a self number, because there is not a number n which added to its sum of digits gives 28470871.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28470811) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2601 + ... + 7981.

It is an arithmetic number, because the mean of its divisors is an integer number (2147418).

Almost surely, 2^28470871 is an apocalyptic number.

28470871 is a deficient number, since it is larger than the sum of its proper divisors (5887817).

28470871 is a wasteful number, since it uses less digits than its factorization.

28470871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5442.

The product of its (nonzero) digits is 25088, while the sum is 37.

The square root of 28470871 is about 5335.8102477506. The cubic root of 28470871 is about 305.3516360072.

The spelling of 28470871 in words is "twenty-eight million, four hundred seventy thousand, eight hundred seventy-one".