731398390632 has 576 divisors, whose sum is σ = 2582566272000. Its totient is φ = 186640796160.

The previous prime is 731398390607. The next prime is 731398390637. The reversal of 731398390632 is 236093893137.

731398390632 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (731398390637) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 129379518 + ... + 129385170.

It is an arithmetic number, because the mean of its divisors is an integer number (4483622000).

Almost surely, 2^731398390632 is an apocalyptic number.

731398390632 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 731398390632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1291283136000).

731398390632 is an abundant number, since it is smaller than the sum of its proper divisors (1851167881368).

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

731398390632 is a wasteful number, since it uses less digits than its factorization.

731398390632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5743 (or 5709 counting only the distinct ones).

The product of its (nonzero) digits is 4408992, while the sum is 54.

The spelling of 731398390632 in words is "seven hundred thirty-one billion, three hundred ninety-eight million, three hundred ninety thousand, six hundred thirty-two".