1489898718 has 128 divisors (see below), whose sum is σ = 4345344000. Its totient is φ = 366599520.

The previous prime is 1489898687. The next prime is 1489898723. The reversal of 1489898718 is 8178989841.

1489898718 is a `hidden beast` number, since 1 + 489 + 89 + 8 + 71 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 69573 + ... + 88431.

It is an arithmetic number, because the mean of its divisors is an integer number (33948000).

Almost surely, 2^1489898718 is an apocalyptic number.

1489898718 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1489898718, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2172672000).

1489898718 is an abundant number, since it is smaller than the sum of its proper divisors (2855445282).

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

1489898718 is a wasteful number, since it uses less digits than its factorization.

1489898718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18907 (or 18901 counting only the distinct ones).

The product of its digits is 9289728, while the sum is 63.

The square root of 1489898718 is about 38599.2061835474. The cubic root of 1489898718 is about 1142.1388792408.

The spelling of 1489898718 in words is "one billion, four hundred eighty-nine million, eight hundred ninety-eight thousand, seven hundred eighteen".