1123051440 has 160 divisors (see below), whose sum is σ = 3996887040. Its totient is φ = 255532032.

The previous prime is 1123051409. The next prime is 1123051469. The reversal of 1123051440 is 441503211.

It is a super-2 number, since 2×1123051440² = 2522489073772147200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

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, 400122 + ... + 402918.

It is an arithmetic number, because the mean of its divisors is an integer number (24980544).

Almost surely, 2^1123051440 is an apocalyptic number.

1123051440 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 1123051440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1998443520).

1123051440 is an abundant number, since it is smaller than the sum of its proper divisors (2873835600).

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

1123051440 is a wasteful number, since it uses less digits than its factorization.

1123051440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3059 (or 3053 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 1123051440 is about 33511.9596562183. The cubic root of 1123051440 is about 1039.4410951571.

Adding to 1123051440 its reverse (441503211), we get a palindrome (1564554651).

The spelling of 1123051440 in words is "one billion, one hundred twenty-three million, fifty-one thousand, four hundred forty".