1230443643 has 64 divisors (see below), whose sum is σ = 1978421760. Its totient is φ = 670387200.

The previous prime is 1230443633. The next prime is 1230443651. The reversal of 1230443643 is 3463440321.

It is not a de Polignac number, because 1230443643 - 2¹⁷ = 1230312571 is a prime.

It is a super-2 number, since 2×1230443643² = 3027983117198222898, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1230443643.

It is not an unprimeable number, because it can be changed into a prime (1230443603) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4378663 + ... + 4378943.

It is an arithmetic number, because the mean of its divisors is an integer number (30912840).

Almost surely, 2^1230443643 is an apocalyptic number.

1230443643 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1230443643 is a deficient number, since it is larger than the sum of its proper divisors (747978117).

1230443643 is a wasteful number, since it uses less digits than its factorization.

1230443643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540.

The product of its (nonzero) digits is 20736, while the sum is 30.

The square root of 1230443643 is about 35077.6801256868. The cubic root of 1230443643 is about 1071.5700719351.

Adding to 1230443643 its reverse (3463440321), we get a palindrome (4693883964).

The spelling of 1230443643 in words is "one billion, two hundred thirty million, four hundred forty-three thousand, six hundred forty-three".