27697827840 has 104 divisors (see below), whose sum is σ = 88622426208. Its totient is φ = 7386071040.

The previous prime is 27697827791. The next prime is 27697827841. The reversal of 27697827840 is 4872879672.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27697827841) 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, 163966 + ... + 286845.

Almost surely, 2^27697827840 is an apocalyptic number.

27697827840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27697827840 is an abundant number, since it is smaller than the sum of its proper divisors (60924598368).

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

27697827840 is an equidigital number, since it uses as much as digits as its factorization.

27697827840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450843 (or 450821 counting only the distinct ones).

The product of its (nonzero) digits is 18966528, while the sum is 60.

The spelling of 27697827840 in words is "twenty-seven billion, six hundred ninety-seven million, eight hundred twenty-seven thousand, eight hundred forty".