1231888488 has 16 divisors (see below), whose sum is σ = 3079721280. Its totient is φ = 410629488.

The previous prime is 1231888453. The next prime is 1231888513. The reversal of 1231888488 is 8848881321.

It is a super-2 number, since 2×1231888488² = 3035098493733852288, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 1231888488.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25664320 + ... + 25664367.

It is an arithmetic number, because the mean of its divisors is an integer number (192482580).

Almost surely, 2^1231888488 is an apocalyptic number.

It is an amenable number.

1231888488 is an abundant number, since it is smaller than the sum of its proper divisors (1847832792).

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

1231888488 is a wasteful number, since it uses less digits than its factorization.

1231888488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51328696 (or 51328692 counting only the distinct ones).

The product of its digits is 786432, while the sum is 51.

The square root of 1231888488 is about 35098.2690171467. The cubic root of 1231888488 is about 1071.9893372556.

The spelling of 1231888488 in words is "one billion, two hundred thirty-one million, eight hundred eighty-eight thousand, four hundred eighty-eight".