1231233040 has 40 divisors (see below), whose sum is σ = 2864702808. Its totient is φ = 492134400.

The previous prime is 1231233037. The next prime is 1231233043. The reversal of 1231233040 is 403321321.

It is an interprime number because it is at equal distance from previous prime (1231233037) and next prime (1231233043).

It can be written as a sum of positive squares in 4 ways, for example, as 928055296 + 303177744 = 30464^2 + 17412^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 1231232999 and 1231233017.

It is not an unprimeable number, because it can be changed into a prime (1231233043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123274 + ... + 132886.

Almost surely, 2^1231233040 is an apocalyptic number.

1231233040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1231233040 is an abundant number, since it is smaller than the sum of its proper divisors (1633469768).

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

1231233040 is a wasteful number, since it uses less digits than its factorization.

1231233040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11227 (or 11221 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 1231233040 is about 35088.9304482197. The cubic root of 1231233040 is about 1071.7991799140.

Adding to 1231233040 its reverse (403321321), we get a palindrome (1634554361).

The spelling of 1231233040 in words is "one billion, two hundred thirty-one million, two hundred thirty-three thousand, forty".