1071859440 has 160 divisors (see below), whose sum is σ = 3419781120. Its totient is φ = 277583872.

The previous prime is 1071859429. The next prime is 1071859447. The reversal of 1071859440 is 449581701.

It is a super-2 number, since 2×1071859440² = 2297765318234227200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1071859447) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1883476 + ... + 1884044.

It is an arithmetic number, because the mean of its divisors is an integer number (21373632).

Almost surely, 2^1071859440 is an apocalyptic number.

1071859440 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 1071859440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1709890560).

1071859440 is an abundant number, since it is smaller than the sum of its proper divisors (2347921680).

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

1071859440 is a wasteful number, since it uses less digits than its factorization.

1071859440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 799 (or 793 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 39.

The square root of 1071859440 is about 32739.2644999853. The cubic root of 1071859440 is about 1023.4012562182.

The spelling of 1071859440 in words is "one billion, seventy-one million, eight hundred fifty-nine thousand, four hundred forty".