402401322 has 24 divisors (see below), whose sum is σ = 923156676. Its totient is φ = 126243456.

The previous prime is 402401257. The next prime is 402401341. The reversal of 402401322 is 223104204.

It can be written as a sum of positive squares in 2 ways, for example, as 400760361 + 1640961 = 20019^2 + 1281^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a zygodrome in base 4.

It is a junction number, because it is equal to n+sod(n) for n = 402401295 and 402401304.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 657213 + ... + 657824.

Almost surely, 2^402401322 is an apocalyptic number.

402401322 is an abundant number, since it is smaller than the sum of its proper divisors (520755354).

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

402401322 is a wasteful number, since it uses less digits than its factorization.

402401322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1315062 (or 1315059 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 402401322 is about 20059.9432202586. The cubic root of 402401322 is about 738.2777833706.

Adding to 402401322 its reverse (223104204), we get a palindrome (625505526).

The spelling of 402401322 in words is "four hundred two million, four hundred one thousand, three hundred twenty-two".