1231888 has 40 divisors (see below), whose sum is σ = 2892672. Its totient is φ = 496128.

The previous prime is 1231883. The next prime is 1231889. The reversal of 1231888 is 8881321.

It is not an unprimeable number, because it can be changed into a prime (1231883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1581 + ... + 2227.

2^1231888 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 1231888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1446336).

1231888 is an abundant number, since it is smaller than the sum of its proper divisors (1660784).

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

1231888 is a wasteful number, since it uses less digits than its factorization.

1231888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 679 (or 673 counting only the distinct ones).

The product of its digits is 3072, while the sum is 31.

The square root of 1231888 is about 1109.9045003963. The cubic root of 1231888 is about 107.1989195703.

The spelling of 1231888 in words is "one million, two hundred thirty-one thousand, eight hundred eighty-eight".