1123023440 has 80 divisors (see below), whose sum is σ = 3255327360. Its totient is φ = 350031360.

The previous prime is 1123023439. The next prime is 1123023469. The reversal of 1123023440 is 443203211.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×1123023440² = 2522363293578867200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84995 + ... + 97314.

It is an arithmetic number, because the mean of its divisors is an integer number (40691592).

Almost surely, 2^1123023440 is an apocalyptic number.

1123023440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1123023440 is an abundant number, since it is smaller than the sum of its proper divisors (2132303920).

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

1123023440 is a wasteful number, since it uses less digits than its factorization.

1123023440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182340 (or 182334 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 1123023440 is about 33511.5418923093. The cubic root of 1123023440 is about 1039.4324566117.

Adding to 1123023440 its reverse (443203211), we get a palindrome (1566226651).

The spelling of 1123023440 in words is "one billion, one hundred twenty-three million, twenty-three thousand, four hundred forty".