1299738960 has 480 divisors, whose sum is σ = 5042593920. Its totient is φ = 309049344.

The previous prime is 1299738949. The next prime is 1299738967. The reversal of 1299738960 is 698379921.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 1299738897 and 1299738906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1299738967) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 9350571 + ... + 9350709.

It is an arithmetic number, because the mean of its divisors is an integer number (10505404).

Almost surely, 2^1299738960 is an apocalyptic number.

1299738960 is a gapful number since it is divisible by the number (10) 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 1299738960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2521296960).

1299738960 is an abundant number, since it is smaller than the sum of its proper divisors (3742854960).

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

1299738960 is a wasteful number, since it uses less digits than its factorization.

1299738960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217 (or 199 counting only the distinct ones).

The product of its (nonzero) digits is 1469664, while the sum is 54.

The square root of 1299738960 is about 36051.8925994184. The cubic root of 1299738960 is about 1091.3198276074.

The spelling of 1299738960 in words is "one billion, two hundred ninety-nine million, seven hundred thirty-eight thousand, nine hundred sixty".