402321130440 has 64 divisors (see below), whose sum is σ = 1219406348160. Its totient is φ = 106179594240.

The previous prime is 402321130363. The next prime is 402321130451. The reversal of 402321130440 is 44031123204.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 402321130440.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 17270196 + ... + 17293475.

It is an arithmetic number, because the mean of its divisors is an integer number (19053224190).

Almost surely, 2^402321130440 is an apocalyptic number.

402321130440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

402321130440 is an abundant number, since it is smaller than the sum of its proper divisors (817085217720).

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

402321130440 is a wasteful number, since it uses less digits than its factorization.

402321130440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34563782 (or 34563778 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 402321130440 its reverse (44031123204), we get a palindrome (446352253644).

The spelling of 402321130440 in words is "four hundred two billion, three hundred twenty-one million, one hundred thirty thousand, four hundred forty".