1122891840 has 504 divisors, whose sum is σ = 4596185880. Its totient is φ = 250822656.

The previous prime is 1122891839. The next prime is 1122891851. The reversal of 1122891840 is 481982211.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 218566656 + 904325184 = 14784^2 + 30072^2 .

It is a tau number, because it is divible by the number of its divisors (504).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1122891795 and 1122891804.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 10301706 + ... + 10301814.

Almost surely, 2^1122891840 is an apocalyptic number.

1122891840 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 1122891840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2298092940).

1122891840 is an abundant number, since it is smaller than the sum of its proper divisors (3473294040).

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

1122891840 is a wasteful number, since it uses less digits than its factorization.

1122891840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219 (or 199 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 36.

The square root of 1122891840 is about 33509.5783321724. The cubic root of 1122891840 is about 1039.3918535249.

The spelling of 1122891840 in words is "one billion, one hundred twenty-two million, eight hundred ninety-one thousand, eight hundred forty".