1298013660 has 168 divisors, whose sum is σ = 4124929536. Its totient is φ = 342921600.

The previous prime is 1298013659. The next prime is 1298013727. The reversal of 1298013660 is 663108921.

1298013660 is a `hidden beast` number, since 1 + 298 + 0 + 1 + 366 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 1851310 + ... + 1852010.

It is an arithmetic number, because the mean of its divisors is an integer number (24553152).

Almost surely, 2^1298013660 is an apocalyptic number.

1298013660 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 1298013660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2062464768).

1298013660 is an abundant number, since it is smaller than the sum of its proper divisors (2826915876).

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

1298013660 is a wasteful number, since it uses less digits than its factorization.

1298013660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 855 (or 838 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 1298013660 is about 36027.9566448057. The cubic root of 1298013660 is about 1090.8367337236.

The spelling of 1298013660 in words is "one billion, two hundred ninety-eight million, thirteen thousand, six hundred sixty".