731641560 has 192 divisors, whose sum is σ = 2434924800. Its totient is φ = 175698432.

The previous prime is 731641553. The next prime is 731641613. The reversal of 731641560 is 65146137.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 871621 + ... + 872459.

It is an arithmetic number, because the mean of its divisors is an integer number (12681900).

Almost surely, 2^731641560 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 731641560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1217462400).

731641560 is an abundant number, since it is smaller than the sum of its proper divisors (1703283240).

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

731641560 is a wasteful number, since it uses less digits than its factorization.

731641560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 922 (or 905 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 731641560 is about 27048.8735440129. The cubic root of 731641560 is about 901.0857513616.

Adding to 731641560 its reverse (65146137), we get a palindrome (796787697).

The spelling of 731641560 in words is "seven hundred thirty-one million, six hundred forty-one thousand, five hundred sixty".