159440440 has 64 divisors (see below), whose sum is σ = 375736320. Its totient is φ = 60816000.

The previous prime is 159440423. The next prime is 159440441. The reversal of 159440440 is 44044951.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159440441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87135 + ... + 88945.

It is an arithmetic number, because the mean of its divisors is an integer number (5870880).

Almost surely, 2^159440440 is an apocalyptic number.

159440440 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 159440440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (187868160).

159440440 is an abundant number, since it is smaller than the sum of its proper divisors (216295880).

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

159440440 is a wasteful number, since it uses less digits than its factorization.

159440440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1924 (or 1920 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 159440440 is about 12626.9727171638. The cubic root of 159440440 is about 542.2499176508.

The spelling of 159440440 in words is "one hundred fifty-nine million, four hundred forty thousand, four hundred forty".