27873870 has 16 divisors (see below), whose sum is σ = 66897360. Its totient is φ = 7433024.

The previous prime is 27873869. The next prime is 27873871. The reversal of 27873870 is 7837872.

It is an interprime number because it is at equal distance from previous prime (27873869) and next prime (27873871).

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27873871) 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, 464535 + ... + 464594.

It is an arithmetic number, because the mean of its divisors is an integer number (4181085).

Almost surely, 2^27873870 is an apocalyptic number.

27873870 is an abundant number, since it is smaller than the sum of its proper divisors (39023490).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

27873870 is a wasteful number, since it uses less digits than its factorization.

27873870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 929139.

The product of its (nonzero) digits is 131712, while the sum is 42.

The square root of 27873870 is about 5279.5710052996. The cubic root of 27873870 is about 303.2022525319.

It can be divided in two parts, 2787 and 3870, that multiplied together give a triangular number (10785690 = T₄₆₄₄).

The spelling of 27873870 in words is "twenty-seven million, eight hundred seventy-three thousand, eight hundred seventy".