31440063340 has 48 divisors (see below), whose sum is σ = 75955912704. Its totient is φ = 10708056000.

The previous prime is 31440063329. The next prime is 31440063407. The reversal of 31440063340 is 4336004413.

It is a super-3 number, since 3×31440063340³ (a number of 32 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 31440063299 and 31440063308.

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, 722476 + ... + 764755.

It is an arithmetic number, because the mean of its divisors is an integer number (1582414848).

Almost surely, 2^31440063340 is an apocalyptic number.

It is an amenable number.

31440063340 is an abundant number, since it is smaller than the sum of its proper divisors (44515849364).

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

31440063340 is a wasteful number, since it uses less digits than its factorization.

31440063340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1487398 (or 1487396 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 28.

Adding to 31440063340 its reverse (4336004413), we get a palindrome (35776067753).

The spelling of 31440063340 in words is "thirty-one billion, four hundred forty million, sixty-three thousand, three hundred forty".