731369871220 has 24 divisors (see below), whose sum is σ = 1561055039208. Its totient is φ = 287752080000.

The previous prime is 731369871191. The next prime is 731369871289. The reversal of 731369871220 is 22178963137.

It can be written as a sum of positive squares in 4 ways, for example, as 9457951504 + 721911919716 = 97252^2 + 849654^2 .

It is a super-3 number, since 3×731369871220³ (a number of 37 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 299740531 + ... + 299742970.

It is an arithmetic number, because the mean of its divisors is an integer number (65043959967).

Almost surely, 2^731369871220 is an apocalyptic number.

It is an amenable number.

731369871220 is an abundant number, since it is smaller than the sum of its proper divisors (829685167988).

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

731369871220 is a wasteful number, since it uses less digits than its factorization.

731369871220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 599483571 (or 599483569 counting only the distinct ones).

The product of its (nonzero) digits is 762048, while the sum is 49.

The spelling of 731369871220 in words is "seven hundred thirty-one billion, three hundred sixty-nine million, eight hundred seventy-one thousand, two hundred twenty".