1043720818 has 16 divisors (see below), whose sum is σ = 1867029120. Its totient is φ = 427860576.

The previous prime is 1043720809. The next prime is 1043720819. The reversal of 1043720818 is 8180273401.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1043720819) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1620363 + ... + 1621006.

It is an arithmetic number, because the mean of its divisors is an integer number (116689320).

Almost surely, 2^1043720818 is an apocalyptic number.

1043720818 is a deficient number, since it is larger than the sum of its proper divisors (823308302).

1043720818 is a wasteful number, since it uses less digits than its factorization.

1043720818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3241401.

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 1043720818 is about 32306.6683209519. The cubic root of 1043720818 is about 1014.3662291192.

The spelling of 1043720818 in words is "one billion, forty-three million, seven hundred twenty thousand, eight hundred eighteen".