1043404440 has 128 divisors (see below), whose sum is σ = 3462298560. Its totient is φ = 249882624.

The previous prime is 1043404391. The next prime is 1043404447. The reversal of 1043404440 is 444043401.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1043404440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1043404447) 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, 48682 + ... + 66758.

Almost surely, 2^1043404440 is an apocalyptic number.

1043404440 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 1043404440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1731149280).

1043404440 is an abundant number, since it is smaller than the sum of its proper divisors (2418894120).

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

1043404440 is a wasteful number, since it uses less digits than its factorization.

1043404440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18141 (or 18137 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

The square root of 1043404440 is about 32301.7714684505. The cubic root of 1043404440 is about 1014.2637254658.

Adding to 1043404440 its reverse (444043401), we get a palindrome (1487447841).

The spelling of 1043404440 in words is "one billion, forty-three million, four hundred four thousand, four hundred forty".