27870040 has 64 divisors (see below), whose sum is σ = 69219360. Its totient is φ = 10014720.

The previous prime is 27869983. The next prime is 27870053. The reversal of 27870040 is 4007872.

It is a junction number, because it is equal to n+sod(n) for n = 27869990 and 27870008.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42354 + ... + 43006.

Almost surely, 2^27870040 is an apocalyptic number.

27870040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27870040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34609680).

27870040 is an abundant number, since it is smaller than the sum of its proper divisors (41349320).

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

27870040 is a wasteful number, since it uses less digits than its factorization.

27870040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 772 (or 768 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 28.

The square root of 27870040 is about 5279.2082739744. The cubic root of 27870040 is about 303.1883647603.

The spelling of 27870040 in words is "twenty-seven million, eight hundred seventy thousand, forty".