1233445556 has 24 divisors (see below), whose sum is σ = 2467643136. Its totient is φ = 528458400.

The previous prime is 1233445513. The next prime is 1233445567. The reversal of 1233445556 is 6555443321.

It is a super-2 number, since 2×1233445556² = 3042775879232298272, which contains 22 as substring.

It is a plaindrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 155765 + ... + 163491.

It is an arithmetic number, because the mean of its divisors is an integer number (102818464).

Almost surely, 2^1233445556 is an apocalyptic number.

It is an amenable number.

1233445556 is an abundant number, since it is smaller than the sum of its proper divisors (1234197580).

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

1233445556 is a wasteful number, since it uses less digits than its factorization.

1233445556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13439 (or 13437 counting only the distinct ones).

The product of its digits is 216000, while the sum is 38.

The square root of 1233445556 is about 35120.4435621192. The cubic root of 1233445556 is about 1072.4408006112.

Adding to 1233445556 its reverse (6555443321), we get a palindrome (7788888877).

The spelling of 1233445556 in words is "one billion, two hundred thirty-three million, four hundred forty-five thousand, five hundred fifty-six".