1398340660 has 48 divisors (see below), whose sum is σ = 3072577536. Its totient is φ = 533553152.

The previous prime is 1398340649. The next prime is 1398340703. The reversal of 1398340660 is 660438931.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 172212 + ... + 180148.

It is an arithmetic number, because the mean of its divisors is an integer number (64012032).

Almost surely, 2^1398340660 is an apocalyptic number.

1398340660 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 1398340660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1536288768).

1398340660 is an abundant number, since it is smaller than the sum of its proper divisors (1674236876).

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

1398340660 is a wasteful number, since it uses less digits than its factorization.

1398340660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8352 (or 8350 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 40.

The square root of 1398340660 is about 37394.3934300317. The cubic root of 1398340660 is about 1118.2467946587.

The spelling of 1398340660 in words is "one billion, three hundred ninety-eight million, three hundred forty thousand, six hundred sixty".