402223440340 has 12 divisors (see below), whose sum is σ = 844669224756. Its totient is φ = 160889376128.

The previous prime is 402223440329. The next prime is 402223440347. The reversal of 402223440340 is 43044322204.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 179365802256 + 222857638084 = 423516^2 + 472078^2 .

It is a junction number, because it is equal to n+sod(n) for n = 402223440299 and 402223440308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402223440347) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 10055585989 + ... + 10055586028.

It is an arithmetic number, because the mean of its divisors is an integer number (70389102063).

Almost surely, 2^402223440340 is an apocalyptic number.

It is an amenable number.

402223440340 is an abundant number, since it is smaller than the sum of its proper divisors (442445784416).

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

402223440340 is a wasteful number, since it uses less digits than its factorization.

402223440340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20111172026 (or 20111172024 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 28.

Adding to 402223440340 its reverse (43044322204), we get a palindrome (445267762544).

The spelling of 402223440340 in words is "four hundred two billion, two hundred twenty-three million, four hundred forty thousand, three hundred forty".