731860740 has 288 divisors, whose sum is σ = 2509678080. Its totient is φ = 171445248.

The previous prime is 731860739. The next prime is 731860751. The reversal of 731860740 is 47068137.

731860740 is a `hidden beast` number, since 7 + 3 + 1 + 8 + 607 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 731860695 and 731860704.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 6839767 + ... + 6839873.

It is an arithmetic number, because the mean of its divisors is an integer number (8714160).

Almost surely, 2^731860740 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 731860740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1254839040).

731860740 is an abundant number, since it is smaller than the sum of its proper divisors (1777817340).

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

731860740 is a wasteful number, since it uses less digits than its factorization.

731860740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251 (or 246 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 731860740 is about 27052.9247956667. The cubic root of 731860740 is about 901.1757226751.

The spelling of 731860740 in words is "seven hundred thirty-one million, eight hundred sixty thousand, seven hundred forty".