1231444368 has 480 divisors, whose sum is σ = 4679700480. Its totient is φ = 292515840.

The previous prime is 1231444367. The next prime is 1231444369. The reversal of 1231444368 is 8634441321.

It is an interprime number because it is at equal distance from previous prime (1231444367) and next prime (1231444369).

It is a Harshad number since it is a multiple of its sum of digits (36).

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

It is not an unprimeable number, because it can be changed into a prime (1231444367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 8859243 + ... + 8859381.

It is an arithmetic number, because the mean of its divisors is an integer number (9749376).

Almost surely, 2^1231444368 is an apocalyptic number.

1231444368 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1231444368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2339850240).

1231444368 is an abundant number, since it is smaller than the sum of its proper divisors (3448256112).

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

1231444368 is a wasteful number, since it uses less digits than its factorization.

1231444368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235 (or 226 counting only the distinct ones).

The product of its digits is 55296, while the sum is 36.

The square root of 1231444368 is about 35091.9416390715. The cubic root of 1231444368 is about 1071.8604973663.

Adding to 1231444368 its reverse (8634441321), we get a palindrome (9865885689).

The spelling of 1231444368 in words is "one billion, two hundred thirty-one million, four hundred forty-four thousand, three hundred sixty-eight".