731630872 has 32 divisors (see below), whose sum is σ = 1650297600. Its totient is φ = 297052704.

The previous prime is 731630849. The next prime is 731630873. The reversal of 731630872 is 278036137.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (731630873) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 342748 + ... + 344875.

It is an arithmetic number, because the mean of its divisors is an integer number (51571800).

Almost surely, 2^731630872 is an apocalyptic number.

It is an amenable number.

731630872 is an abundant number, since it is smaller than the sum of its proper divisors (918666728).

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

731630872 is a wasteful number, since it uses less digits than its factorization.

731630872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 687655 (or 687651 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 37.

The square root of 731630872 is about 27048.6759749900. The cubic root of 731630872 is about 901.0813635795.

The spelling of 731630872 in words is "seven hundred thirty-one million, six hundred thirty thousand, eight hundred seventy-two".