400040322 has 16 divisors (see below), whose sum is σ = 872815392. Its totient is φ = 121224320.

The previous prime is 400040299. The next prime is 400040323. The reversal of 400040322 is 223040004.

It is a happy number.

It is a super-3 number, since 3×400040322³ (a number of 27 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (400040323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3030543 + ... + 3030674.

It is an arithmetic number, because the mean of its divisors is an integer number (54550962).

Almost surely, 2^400040322 is an apocalyptic number.

400040322 is an abundant number, since it is smaller than the sum of its proper divisors (472775070).

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

400040322 is a wasteful number, since it uses less digits than its factorization.

400040322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6061233.

The product of its (nonzero) digits is 192, while the sum is 15.

The square root of 400040322 is about 20001.0080245972. The cubic root of 400040322 is about 736.8310568159.

Adding to 400040322 its reverse (223040004), we get a palindrome (623080326).

The spelling of 400040322 in words is "four hundred million, forty thousand, three hundred twenty-two".