1123432403240 has 128 divisors (see below), whose sum is σ = 2919300134400. Its totient is φ = 381131796480.

The previous prime is 1123432403189. The next prime is 1123432403267. The reversal of 1123432403240 is 423042343211.

It is a super-3 number, since 3×1123432403240³ (a number of 37 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11882876 + ... + 11977044.

It is an arithmetic number, because the mean of its divisors is an integer number (22807032300).

Almost surely, 2^{1123432403240} is an apocalyptic number.

1123432403240 is a gapful number since it is divisible by the number (10) 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 1123432403240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1459650067200).

1123432403240 is an abundant number, since it is smaller than the sum of its proper divisors (1795867731160).

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

1123432403240 is a wasteful number, since it uses less digits than its factorization.

1123432403240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94635 (or 94631 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 1123432403240 its reverse (423042343211), we get a palindrome (1546474746451).

The spelling of 1123432403240 in words is "one trillion, one hundred twenty-three billion, four hundred thirty-two million, four hundred three thousand, two hundred forty".