1398739760 has 160 divisors (see below), whose sum is σ = 3666622464. Its totient is φ = 491904000.

The previous prime is 1398739751. The next prime is 1398739799. The reversal of 1398739760 is 679378931.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3811097 + ... + 3811463.

Almost surely, 2^1398739760 is an apocalyptic number.

1398739760 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 1398739760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1833311232).

1398739760 is an abundant number, since it is smaller than the sum of its proper divisors (2267882704).

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

1398739760 is a wasteful number, since it uses less digits than its factorization.

1398739760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 523 (or 517 counting only the distinct ones).

The product of its (nonzero) digits is 1714608, while the sum is 53.

The square root of 1398739760 is about 37399.7294107858. The cubic root of 1398739760 is about 1118.3531707029.

The spelling of 1398739760 in words is "one billion, three hundred ninety-eight million, seven hundred thirty-nine thousand, seven hundred sixty".