402440313340 has 96 divisors (see below), whose sum is σ = 925979765760. Its totient is φ = 146008617216.

The previous prime is 402440313323. The next prime is 402440313419. The reversal of 402440313340 is 43313044204.

It is a junction number, because it is equal to n+sod(n) for n = 402440313299 and 402440313308.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44895699 + ... + 44904661.

It is an arithmetic number, because the mean of its divisors is an integer number (9645622560).

Almost surely, 2^402440313340 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 402440313340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (462989882880).

402440313340 is an abundant number, since it is smaller than the sum of its proper divisors (523539452420).

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

402440313340 is a wasteful number, since it uses less digits than its factorization.

402440313340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11971 (or 11969 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 402440313340 its reverse (43313044204), we get a palindrome (445753357544).

The spelling of 402440313340 in words is "four hundred two billion, four hundred forty million, three hundred thirteen thousand, three hundred forty".