1299437568 has 576 divisors, whose sum is σ = 4829479200. Its totient is φ = 330301440.

The previous prime is 1299437561. The next prime is 1299437591. The reversal of 1299437568 is 8657349921.

1299437568 is a `hidden beast` number, since 129 + 94 + 375 + 68 = 666.

It is a tau number, because it is divible by the number of its divisors (576).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1299437561) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 44808178 + ... + 44808206.

Almost surely, 2^1299437568 is an apocalyptic number.

1299437568 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1299437568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2414739600).

1299437568 is an abundant number, since it is smaller than the sum of its proper divisors (3530041632).

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

1299437568 is a wasteful number, since it uses less digits than its factorization.

1299437568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98 (or 75 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 54.

The square root of 1299437568 is about 36047.7123823413. The cubic root of 1299437568 is about 1091.2354669518.

The spelling of 1299437568 in words is "one billion, two hundred ninety-nine million, four hundred thirty-seven thousand, five hundred sixty-eight".