402044404420 has 12 divisors (see below), whose sum is σ = 844293249324. Its totient is φ = 160817761760.

The previous prime is 402044404369. The next prime is 402044404427. The reversal of 402044404420 is 24404440204.

It can be written as a sum of positive squares in 2 ways, for example, as 211347995076 + 190696409344 = 459726^2 + 436688^2 .

It is not an unprimeable number, because it can be changed into a prime (402044404427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10051110091 + ... + 10051110130.

It is an arithmetic number, because the mean of its divisors is an integer number (70357770777).

Almost surely, 2^402044404420 is an apocalyptic number.

It is an amenable number.

402044404420 is an abundant number, since it is smaller than the sum of its proper divisors (442248844904).

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

402044404420 is a wasteful number, since it uses less digits than its factorization.

402044404420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20102220230 (or 20102220228 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 28.

Adding to 402044404420 its reverse (24404440204), we get a palindrome (426448844624).

The spelling of 402044404420 in words is "four hundred two billion, forty-four million, four hundred four thousand, four hundred twenty".