1298139360 has 288 divisors, whose sum is σ = 4814238240. Its totient is φ = 293142528.

The previous prime is 1298139319. The next prime is 1298139361. The reversal of 1298139360 is 639318921.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1298139361) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2281156 + ... + 2281724.

It is an arithmetic number, because the mean of its divisors is an integer number (16716105).

Almost surely, 2^1298139360 is an apocalyptic number.

1298139360 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 1298139360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2407119120).

1298139360 is an abundant number, since it is smaller than the sum of its proper divisors (3516098880).

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

1298139360 is a wasteful number, since it uses less digits than its factorization.

1298139360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 698 (or 683 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 1298139360 is about 36029.7010811913. The cubic root of 1298139360 is about 1090.8719448968.

The spelling of 1298139360 in words is "one billion, two hundred ninety-eight million, one hundred thirty-nine thousand, three hundred sixty".