1123127640 has 128 divisors (see below), whose sum is σ = 3779136000. Its totient is φ = 296671104.

The previous prime is 1123127587. The next prime is 1123127653. The reversal of 1123127640 is 467213211.

1123127640 is a `hidden beast` number, since 1 + 1 + 2 + 3 + 12 + 7 + 640 = 666.

It is a super-2 number, since 2×1123127640² = 2522831391463939200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 110701 + ... + 120419.

It is an arithmetic number, because the mean of its divisors is an integer number (29524500).

Almost surely, 2^1123127640 is an apocalyptic number.

1123127640 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 1123127640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1889568000).

1123127640 is an abundant number, since it is smaller than the sum of its proper divisors (2656008360).

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

1123127640 is a wasteful number, since it uses less digits than its factorization.

1123127640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9846 (or 9836 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 1123127640 is about 33513.0965444854. The cubic root of 1123127640 is about 1039.4646036143.

The spelling of 1123127640 in words is "one billion, one hundred twenty-three million, one hundred twenty-seven thousand, six hundred forty".