1071843840 has 240 divisors, whose sum is σ = 3851815968. Its totient is φ = 285659136.

The previous prime is 1071843811. The next prime is 1071843847. The reversal of 1071843840 is 483481701.

It is a tau number, because it is divible by the number of its divisors (240).

It is a super-2 number, since 2×1071843840² = 2297698434691891200, which contains 22 as substring.

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 = 1071843795 and 1071843804.

It is not an unprimeable number, because it can be changed into a prime (1071843847) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 621219 + ... + 622941.

Almost surely, 2^1071843840 is an apocalyptic number.

1071843840 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 1071843840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1925907984).

1071843840 is an abundant number, since it is smaller than the sum of its proper divisors (2779972128).

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

1071843840 is an frugal number, since it uses more digits than its factorization.

1071843840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1761 (or 1733 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 1071843840 is about 32739.0262530821. The cubic root of 1071843840 is about 1023.3962912833.

The spelling of 1071843840 in words is "one billion, seventy-one million, eight hundred forty-three thousand, eight hundred forty".