1299298499928 has 256 divisors, whose sum is σ = 4251360960000. Its totient is φ = 362477928960.

The previous prime is 1299298499927. The next prime is 1299298499957. The reversal of 1299298499928 is 8299948929921.

1299298499928 is a `hidden beast` number, since 12 + 9 + 9 + 2 + 98 + 499 + 9 + 28 = 666.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1299298499927) 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, 11651058 + ... + 11762046.

It is an arithmetic number, because the mean of its divisors is an integer number (16606878750).

Almost surely, 2^{1299298499928} is an apocalyptic number.

1299298499928 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 1299298499928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2125680480000).

1299298499928 is an abundant number, since it is smaller than the sum of its proper divisors (2952062460072).

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

1299298499928 is a wasteful number, since it uses less digits than its factorization.

1299298499928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111407 (or 111397 counting only the distinct ones).

The product of its digits is 1088391168, while the sum is 81.

The spelling of 1299298499928 in words is "one trillion, two hundred ninety-nine billion, two hundred ninety-eight million, four hundred ninety-nine thousand, nine hundred twenty-eight".