731881028736 has 640 divisors, whose sum is σ = 2693626689600. Its totient is φ = 193939660800.

The previous prime is 731881028651. The next prime is 731881028779. The reversal of 731881028736 is 637820188137.

731881028736 is a `hidden beast` number, since 7 + 318 + 8 + 10 + 287 + 36 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 28156866 + ... + 28182846.

Almost surely, 2^731881028736 is an apocalyptic number.

731881028736 is a gapful number since it is divisible by the number (76) 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 731881028736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1346813344800).

731881028736 is an abundant number, since it is smaller than the sum of its proper divisors (1961745660864).

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

731881028736 is a wasteful number, since it uses less digits than its factorization.

731881028736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26050 (or 26029 counting only the distinct ones).

The product of its (nonzero) digits is 2709504, while the sum is 54.

The spelling of 731881028736 in words is "seven hundred thirty-one billion, eight hundred eighty-one million, twenty-eight thousand, seven hundred thirty-six".