31373366440 has 64 divisors (see below), whose sum is σ = 76138392960. Its totient is φ = 11565984000.

The previous prime is 31373366417. The next prime is 31373366503. The reversal of 31373366440 is 4466337313.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 31373366393 and 31373366402.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 289815 + ... + 383065.

It is an arithmetic number, because the mean of its divisors is an integer number (1189662390).

Almost surely, 2^31373366440 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31373366440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38069196480).

31373366440 is an abundant number, since it is smaller than the sum of its proper divisors (44765026520).

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

31373366440 is a wasteful number, since it uses less digits than its factorization.

31373366440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93922 (or 93918 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 40.

The spelling of 31373366440 in words is "thirty-one billion, three hundred seventy-three million, three hundred sixty-six thousand, four hundred forty".