27288455840 has 48 divisors (see below), whose sum is σ = 64478854440. Its totient is φ = 10913710080.

The previous prime is 27288455771. The next prime is 27288455849. The reversal of 27288455840 is 4855488272.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 10850138896 + 16438316944 = 104164^2 + 128212^2 .

It is not an unprimeable number, because it can be changed into a prime (27288455849) 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, 2023520 + ... + 2036960.

Almost surely, 2^27288455840 is an apocalyptic number.

27288455840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27288455840 is an abundant number, since it is smaller than the sum of its proper divisors (37190398600).

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

27288455840 is a wasteful number, since it uses less digits than its factorization.

27288455840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26145 (or 26137 counting only the distinct ones).

The product of its (nonzero) digits is 5734400, while the sum is 53.

The spelling of 27288455840 in words is "twenty-seven billion, two hundred eighty-eight million, four hundred fifty-five thousand, eight hundred forty".