402220430440 has 32 divisors (see below), whose sum is σ = 958231027080. Its totient is φ = 151424161792.

The previous prime is 402220430341. The next prime is 402220430449. The reversal of 402220430440 is 44034022204.

It can be written as a sum of positive squares in 4 ways, for example, as 392579939844 + 9640490596 = 626562^2 + 98186^2 .

It is not an unprimeable number, because it can be changed into a prime (402220430449) 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 7 ways as a sum of consecutive naturals, for example, 295749637 + ... + 295750996.

Almost surely, 2^402220430440 is an apocalyptic number.

402220430440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

402220430440 is an abundant number, since it is smaller than the sum of its proper divisors (556010596640).

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

402220430440 is a wasteful number, since it uses less digits than its factorization.

402220430440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 591500661 (or 591500657 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 25.

Adding to 402220430440 its reverse (44034022204), we get a palindrome (446254452644).

The spelling of 402220430440 in words is "four hundred two billion, two hundred twenty million, four hundred thirty thousand, four hundred forty".