1298361960 has 640 divisors, whose sum is σ = 5519923200. Its totient is φ = 266872320.

The previous prime is 1298361959. The next prime is 1298361991. The reversal of 1298361960 is 691638921.

It is a happy number.

1298361960 is a `hidden beast` number, since 1 + 29 + 8 + 3 + 619 + 6 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 9911095 + ... + 9911225.

It is an arithmetic number, because the mean of its divisors is an integer number (8624880).

Almost surely, 2^1298361960 is an apocalyptic number.

1298361960 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 1298361960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2759961600).

1298361960 is an abundant number, since it is smaller than the sum of its proper divisors (4221561240).

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

1298361960 is a wasteful number, since it uses less digits than its factorization.

1298361960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203 (or 190 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The square root of 1298361960 is about 36032.7900668266. The cubic root of 1298361960 is about 1090.9342941905.

The spelling of 1298361960 in words is "one billion, two hundred ninety-eight million, three hundred sixty-one thousand, nine hundred sixty".