1289913534 has 288 divisors, whose sum is σ = 3824271360. Its totient is φ = 310262400.

The previous prime is 1289913529. The next prime is 1289913563. The reversal of 1289913534 is 4353199821.

It is a happy number.

1289913534 is a `hidden beast` number, since 1 + 28 + 9 + 91 + 3 + 534 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 1289913534.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 6753379 + ... + 6753569.

It is an arithmetic number, because the mean of its divisors is an integer number (13278720).

Almost surely, 2^1289913534 is an apocalyptic number.

1289913534 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1289913534, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1912135680).

1289913534 is an abundant number, since it is smaller than the sum of its proper divisors (2534357826).

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

1289913534 is a wasteful number, since it uses less digits than its factorization.

1289913534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276 (or 266 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The square root of 1289913534 is about 35915.3662657086. The cubic root of 1289913534 is about 1088.5629110016.

The spelling of 1289913534 in words is "one billion, two hundred eighty-nine million, nine hundred thirteen thousand, five hundred thirty-four".