159802398 has 48 divisors (see below), whose sum is σ = 401296896. Its totient is φ = 45012240.

The previous prime is 159802387. The next prime is 159802399. The reversal of 159802398 is 893208951.

It is a happy number.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159802399) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15 + ... + 17877.

It is an arithmetic number, because the mean of its divisors is an integer number (8360352).

Almost surely, 2^159802398 is an apocalyptic number.

159802398 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 159802398, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (200648448).

159802398 is an abundant number, since it is smaller than the sum of its proper divisors (241494498).

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

159802398 is a wasteful number, since it uses less digits than its factorization.

159802398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17949 (or 17946 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 45.

The square root of 159802398 is about 12641.2973226643. The cubic root of 159802398 is about 542.6599419393.

The spelling of 159802398 in words is "one hundred fifty-nine million, eight hundred two thousand, three hundred ninety-eight".