1043321640 has 32 divisors (see below), whose sum is σ = 3129965280. Its totient is φ = 278219072.

The previous prime is 1043321639. The next prime is 1043321659. The reversal of 1043321640 is 461233401.

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 1043321640.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4347054 + ... + 4347293.

It is an arithmetic number, because the mean of its divisors is an integer number (97811415).

Almost surely, 2^1043321640 is an apocalyptic number.

1043321640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1043321640 is an abundant number, since it is smaller than the sum of its proper divisors (2086643640).

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

1043321640 is a wasteful number, since it uses less digits than its factorization.

1043321640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8694361 (or 8694357 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 1043321640 is about 32300.4897795684. The cubic root of 1043321640 is about 1014.2368955825.

The spelling of 1043321640 in words is "one billion, forty-three million, three hundred twenty-one thousand, six hundred forty".