159649440 has 96 divisors (see below), whose sum is σ = 524797056. Its totient is φ = 40719360.

The previous prime is 159649439. The next prime is 159649453. The reversal of 159649440 is 44946951.

It is a tau number, because it is divible by the number of its divisors (96).

It is a junction number, because it is equal to n+sod(n) for n = 159649392 and 159649401.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3810 + ... + 18270.

It is an arithmetic number, because the mean of its divisors is an integer number (5466636).

Almost surely, 2^159649440 is an apocalyptic number.

159649440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 159649440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (262398528).

159649440 is an abundant number, since it is smaller than the sum of its proper divisors (365147616).

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

159649440 is a wasteful number, since it uses less digits than its factorization.

159649440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14502 (or 14494 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 42.

The square root of 159649440 is about 12635.2459414132. The cubic root of 159649440 is about 542.4867474659.

The spelling of 159649440 in words is "one hundred fifty-nine million, six hundred forty-nine thousand, four hundred forty".