31446490240 has 128 divisors (see below), whose sum is σ = 83402136000. Its totient is φ = 11241123840.

The previous prime is 31446490219. The next prime is 31446490249. The reversal of 31446490240 is 4209464413.

It is a tau number, because it is divible by the number of its divisors (128).

It is a self number, because there is not a number n which added to its sum of digits gives 31446490240.

It is not an unprimeable number, because it can be changed into a prime (31446490249) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 377506 + ... + 453214.

Almost surely, 2^31446490240 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 31446490240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41701068000).

31446490240 is an abundant number, since it is smaller than the sum of its proper divisors (51955645760).

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

31446490240 is a wasteful number, since it uses less digits than its factorization.

31446490240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75798 (or 75786 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 37.

The spelling of 31446490240 in words is "thirty-one billion, four hundred forty-six million, four hundred ninety thousand, two hundred forty".