1043709840 has 160 divisors (see below), whose sum is σ = 3622268160. Its totient is φ = 276212736.

The previous prime is 1043709833. The next prime is 1043709841. The reversal of 1043709840 is 489073401.

It is a happy number.

It is a super-2 number, since 2×1043709840² = 2178660460225651200, 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 = 1043709795 and 1043709804.

It is not an unprimeable number, because it can be changed into a prime (1043709841) 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, 294157 + ... + 297683.

It is an arithmetic number, because the mean of its divisors is an integer number (22639176).

Almost surely, 2^1043709840 is an apocalyptic number.

1043709840 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 1043709840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1811134080).

1043709840 is an abundant number, since it is smaller than the sum of its proper divisors (2578558320).

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

1043709840 is a wasteful number, since it uses less digits than its factorization.

1043709840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3686 (or 3674 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 1043709840 is about 32306.4984175011. The cubic root of 1043709840 is about 1014.3626726920.

The spelling of 1043709840 in words is "one billion, forty-three million, seven hundred nine thousand, eight hundred forty".