28070871 has 8 divisors (see below), whose sum is σ = 37467120. Its totient is φ = 18694272.

The previous prime is 28070851. The next prime is 28070881. The reversal of 28070871 is 17807082.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28070871 - 2⁵ = 28070839 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28070821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1170 + ... + 7583.

It is an arithmetic number, because the mean of its divisors is an integer number (4683390).

Almost surely, 2^28070871 is an apocalyptic number.

28070871 is a deficient number, since it is larger than the sum of its proper divisors (9396249).

28070871 is a wasteful number, since it uses less digits than its factorization.

28070871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9825.

The product of its (nonzero) digits is 6272, while the sum is 33.

The square root of 28070871 is about 5298.1950700215. The cubic root of 28070871 is about 303.9148790709.

The spelling of 28070871 in words is "twenty-eight million, seventy thousand, eight hundred seventy-one".