11987648238 has 16 divisors (see below), whose sum is σ = 23976622080. Its totient is φ = 3995661816.

The previous prime is 11987648219. The next prime is 11987648263. The reversal of 11987648238 is 83284678911.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92883 + ... + 180561.

It is an arithmetic number, because the mean of its divisors is an integer number (1498538880).

Almost surely, 2^11987648238 is an apocalyptic number.

11987648238 is an abundant number, since it is smaller than the sum of its proper divisors (11988973842).

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

11987648238 is a wasteful number, since it uses less digits than its factorization.

11987648238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110471.

The product of its digits is 4644864, while the sum is 57.

The spelling of 11987648238 in words is "eleven billion, nine hundred eighty-seven million, six hundred forty-eight thousand, two hundred thirty-eight".