731705660 has 48 divisors (see below), whose sum is σ = 1782326784. Its totient is φ = 247123008.

The previous prime is 731705659. The next prime is 731705701. The reversal of 731705660 is 66507137.

731705660 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 731705660.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29624 + ... + 48383.

It is an arithmetic number, because the mean of its divisors is an integer number (37131808).

Almost surely, 2^731705660 is an apocalyptic number.

731705660 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

731705660 is an abundant number, since it is smaller than the sum of its proper divisors (1050621124).

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

731705660 is a wasteful number, since it uses less digits than its factorization.

731705660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78090 (or 78088 counting only the distinct ones).

The product of its (nonzero) digits is 26460, while the sum is 35.

The square root of 731705660 is about 27050.0584102881. The cubic root of 731705660 is about 901.1120656632.

The spelling of 731705660 in words is "seven hundred thirty-one million, seven hundred five thousand, six hundred sixty".