159990390 has 240 divisors, whose sum is σ = 521413200. Its totient is φ = 35054208.

The previous prime is 159990367. The next prime is 159990403. The reversal of 159990390 is 93099951.

It is a Harshad number since it is a multiple of its sum of digits (45).

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 119 ways as a sum of consecutive naturals, for example, 1150941 + ... + 1151079.

It is an arithmetic number, because the mean of its divisors is an integer number (2172555).

Almost surely, 2^159990390 is an apocalyptic number.

159990390 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 159990390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (260706600).

159990390 is an abundant number, since it is smaller than the sum of its proper divisors (361422810).

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

159990390 is a wasteful number, since it uses less digits than its factorization.

159990390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201 (or 185 counting only the distinct ones).

The product of its (nonzero) digits is 98415, while the sum is 45.

The square root of 159990390 is about 12648.7307663655. The cubic root of 159990390 is about 542.8726541208.

The spelling of 159990390 in words is "one hundred fifty-nine million, nine hundred ninety thousand, three hundred ninety".