159489640 has 32 divisors (see below), whose sum is σ = 359217000. Its totient is φ = 63730944.

The previous prime is 159489607. The next prime is 159489641. The reversal of 159489640 is 46984951.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 109956196 + 49533444 = 10486^2 + 7038^2 .

It is not an unprimeable number, because it can be changed into a prime (159489641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65566 + ... + 67954.

Almost surely, 2^159489640 is an apocalyptic number.

159489640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

159489640 is an abundant number, since it is smaller than the sum of its proper divisors (199727360).

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

159489640 is a wasteful number, since it uses less digits than its factorization.

159489640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4069 (or 4065 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 46.

The square root of 159489640 is about 12628.9207773269. The cubic root of 159489640 is about 542.3056875928.

The spelling of 159489640 in words is "one hundred fifty-nine million, four hundred eighty-nine thousand, six hundred forty".