27885840 has 40 divisors (see below), whose sum is σ = 86446848. Its totient is φ = 7436160.

The previous prime is 27885829. The next prime is 27885841. The reversal of 27885840 is 4858872.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 27885792 and 27885801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27885841) 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, 57856 + ... + 58335.

Almost surely, 2^27885840 is an apocalyptic number.

27885840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27885840 is an abundant number, since it is smaller than the sum of its proper divisors (58561008).

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

27885840 is a wasteful number, since it uses less digits than its factorization.

27885840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116207 (or 116201 counting only the distinct ones).

The product of its (nonzero) digits is 143360, while the sum is 42.

The square root of 27885840 is about 5280.7044984547. The cubic root of 27885840 is about 303.2456481513.

The spelling of 27885840 in words is "twenty-seven million, eight hundred eighty-five thousand, eight hundred forty".