28679871 has 16 divisors (see below), whose sum is σ = 41827968. Its totient is φ = 17335200.

The previous prime is 28679863. The next prime is 28679879. The reversal of 28679871 is 17897682.

28679871 = T₉₀ + T₉₁ + ... + T₅₅₆.

It is an interprime number because it is at equal distance from previous prime (28679863) and next prime (28679879).

It is not a de Polignac number, because 28679871 - 2³ = 28679863 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28679871.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28679879) 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, 14481 + ... + 16341.

It is an arithmetic number, because the mean of its divisors is an integer number (2614248).

Almost surely, 2^28679871 is an apocalyptic number.

28679871 is a deficient number, since it is larger than the sum of its proper divisors (13148097).

28679871 is a wasteful number, since it uses less digits than its factorization.

28679871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2342.

The product of its digits is 338688, while the sum is 48.

The square root of 28679871 is about 5355.3590916016. The cubic root of 28679871 is about 306.0969939009.

The spelling of 28679871 in words is "twenty-eight million, six hundred seventy-nine thousand, eight hundred seventy-one".