31402328805 has 32 divisors (see below), whose sum is σ = 55967078400. Its totient is φ = 16705694016.

The previous prime is 31402328803. The next prime is 31402328827. The reversal of 31402328805 is 50882320413.

It is not a de Polignac number, because 31402328805 - 2¹ = 31402328803 is a prime.

It is a super-2 number, since 2×31402328805² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31402328805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31402328801) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 239365 + ... + 346554.

It is an arithmetic number, because the mean of its divisors is an integer number (1748971200).

Almost surely, 2^31402328805 is an apocalyptic number.

It is an amenable number.

31402328805 is a deficient number, since it is larger than the sum of its proper divisors (24564749595).

31402328805 is a wasteful number, since it uses less digits than its factorization.

31402328805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 586330 (or 586324 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The spelling of 31402328805 in words is "thirty-one billion, four hundred two million, three hundred twenty-eight thousand, eight hundred five".