31343860440 has 96 divisors (see below), whose sum is σ = 105640451280. Its totient is φ = 8358360192.

The previous prime is 31343860439. The next prime is 31343860447. The reversal of 31343860440 is 4406834313.

It is a happy number.

31343860440 is a `hidden beast` number, since 3 + 1 + 3 + 4 + 3 + 8 + 604 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 31343860395 and 31343860404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31343860447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1602619 + ... + 1622058.

Almost surely, 2^31343860440 is an apocalyptic number.

31343860440 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31343860440 is an abundant number, since it is smaller than the sum of its proper divisors (74296590840).

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

31343860440 is a wasteful number, since it uses less digits than its factorization.

31343860440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3224703 (or 3224687 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 36.

The spelling of 31343860440 in words is "thirty-one billion, three hundred forty-three million, eight hundred sixty thousand, four hundred forty".