1043591818 has 16 divisors (see below), whose sum is σ = 1658331144. Its totient is φ = 490846720.

The previous prime is 1043591797. The next prime is 1043591953. The reversal of 1043591818 is 8181953401.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 983637769 + 59954049 = 31363^2 + 7743^2 .

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, 69198 + ... + 82918.

Almost surely, 2^1043591818 is an apocalyptic number.

1043591818 is a deficient number, since it is larger than the sum of its proper divisors (614739326).

1043591818 is a wasteful number, since it uses less digits than its factorization.

1043591818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15977.

The product of its (nonzero) digits is 34560, while the sum is 40.

The square root of 1043591818 is about 32304.6717674085. The cubic root of 1043591818 is about 1014.3244367699.

The spelling of 1043591818 in words is "one billion, forty-three million, five hundred ninety-one thousand, eight hundred eighteen".