1289348442 has 40 divisors (see below), whose sum is σ = 3059048916. Its totient is φ = 404500608.

The previous prime is 1289348387. The next prime is 1289348449. The reversal of 1289348442 is 2448439821.

1289348442 is a `hidden beast` number, since 128 + 9 + 3 + 484 + 42 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1187560521 + 101787921 = 34461^2 + 10089^2 .

It is not an unprimeable number, because it can be changed into a prime (1289348449) by changing a digit.

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 19 ways as a sum of consecutive naturals, for example, 231333 + ... + 236840.

Almost surely, 2^1289348442 is an apocalyptic number.

1289348442 is an abundant number, since it is smaller than the sum of its proper divisors (1769700474).

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

1289348442 is a wasteful number, since it uses less digits than its factorization.

1289348442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468204 (or 468195 counting only the distinct ones).

The product of its digits is 442368, while the sum is 45.

The square root of 1289348442 is about 35907.4984091067. The cubic root of 1289348442 is about 1088.4039266909.

The spelling of 1289348442 in words is "one billion, two hundred eighty-nine million, three hundred forty-eight thousand, four hundred forty-two".