727399640832 has 72 divisors (see below), whose sum is σ = 1937033261184. Its totient is φ = 242330102784.

The previous prime is 727399640809. The next prime is 727399640857. The reversal of 727399640832 is 238046993727.

It is a super-2 number, since 2×727399640832² (a number of 25 digits) contains 22 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, 1103743 + ... + 1634945.

Almost surely, 2^727399640832 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 727399640832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (968516630592).

727399640832 is an abundant number, since it is smaller than the sum of its proper divisors (1209633620352).

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

727399640832 is a wasteful number, since it uses less digits than its factorization.

727399640832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533005 (or 532991 counting only the distinct ones).

The product of its (nonzero) digits is 27433728, while the sum is 60.

The spelling of 727399640832 in words is "seven hundred twenty-seven billion, three hundred ninety-nine million, six hundred forty thousand, eight hundred thirty-two".