731394881940 has 24 divisors (see below), whose sum is σ = 2047905669600. Its totient is φ = 195038635168.

The previous prime is 731394881923. The next prime is 731394882007. The reversal of 731394881940 is 49188493137.

It is a happy number.

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, 6094957290 + ... + 6094957409.

It is an arithmetic number, because the mean of its divisors is an integer number (85329402900).

Almost surely, 2^731394881940 is an apocalyptic number.

It is an amenable number.

731394881940 is an abundant number, since it is smaller than the sum of its proper divisors (1316510787660).

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

731394881940 is a wasteful number, since it uses less digits than its factorization.

731394881940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12189914711 (or 12189914709 counting only the distinct ones).

The product of its (nonzero) digits is 5225472, while the sum is 57.

The spelling of 731394881940 in words is "seven hundred thirty-one billion, three hundred ninety-four million, eight hundred eighty-one thousand, nine hundred forty".