159849990 has 64 divisors (see below), whose sum is σ = 437814720. Its totient is φ = 41472000.

The previous prime is 159849971. The next prime is 159850063. The reversal of 159849990 is 99948951.

159849990 is a `hidden beast` number, since 1 + 598 + 49 + 9 + 9 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent 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, 1990 + ... + 17990.

It is an arithmetic number, because the mean of its divisors is an integer number (6840855).

Almost surely, 2^159849990 is an apocalyptic number.

159849990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 159849990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (218907360).

159849990 is an abundant number, since it is smaller than the sum of its proper divisors (277964730).

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

159849990 is a wasteful number, since it uses less digits than its factorization.

159849990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16054 (or 16048 counting only the distinct ones).

The product of its (nonzero) digits is 1049760, while the sum is 54.

The square root of 159849990 is about 12643.1795842660. The cubic root of 159849990 is about 542.7138078572.

The spelling of 159849990 in words is "one hundred fifty-nine million, eight hundred forty-nine thousand, nine hundred ninety".