27917287424 has 64 divisors (see below), whose sum is σ = 60129542130. Its totient is φ = 12884901888.

The previous prime is 27917287421. The next prime is 27917287483. The reversal of 27917287424 is 42478271972.

It can be written as a sum of positive squares in only one way, i.e., 26843545600 + 1073741824 = 163840^2 + 32768^2 .

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×27917287424² (a number of 22 digits) contains 22 as substring.

It is a nialpdrome in base 8.

It is not an unprimeable number, because it can be changed into a prime (27917287421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (3) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2147483642 + ... + 2147483654.

Almost surely, 2^27917287424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27917287424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30064771065).

27917287424 is an abundant number, since it is smaller than the sum of its proper divisors (32212254706).

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

27917287424 is an frugal number, since it uses more digits than its factorization.

27917287424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75 (or 15 counting only the distinct ones).

The product of its digits is 3161088, while the sum is 53.

The spelling of 27917287424 in words is "twenty-seven billion, nine hundred seventeen million, two hundred eighty-seven thousand, four hundred twenty-four".