731723130 has 48 divisors (see below), whose sum is σ = 1906337160. Its totient is φ = 194730624.

The previous prime is 731723123. The next prime is 731723159. The reversal of 731723130 is 31327137.

It can be written as a sum of positive squares in 4 ways, for example, as 711769041 + 19954089 = 26679^2 + 4467^2 .

It is a junction number, because it is equal to n+sod(n) for n = 731723094 and 731723103.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37824 + ... + 53796.

Almost surely, 2^731723130 is an apocalyptic number.

731723130 is an abundant number, since it is smaller than the sum of its proper divisors (1174614030).

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

731723130 is a wasteful number, since it uses less digits than its factorization.

731723130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16495 (or 16492 counting only the distinct ones).

The product of its (nonzero) digits is 2646, while the sum is 27.

The square root of 731723130 is about 27050.3813281809. The cubic root of 731723130 is about 901.1192371728.

The spelling of 731723130 in words is "seven hundred thirty-one million, seven hundred twenty-three thousand, one hundred thirty".