400022390 has 16 divisors (see below), whose sum is σ = 757937520. Its totient is φ = 151587360.

The previous prime is 400022309. The next prime is 400022443. The reversal of 400022390 is 93220004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1052501 + ... + 1052880.

It is an arithmetic number, because the mean of its divisors is an integer number (47371095).

Almost surely, 2^400022390 is an apocalyptic number.

400022390 is a deficient number, since it is larger than the sum of its proper divisors (357915130).

400022390 is a wasteful number, since it uses less digits than its factorization.

400022390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2105407.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 400022390 is about 20000.5597421672. The cubic root of 400022390 is about 736.8200470491.

Adding to 400022390 its reverse (93220004), we get a palindrome (493242394).

The spelling of 400022390 in words is "four hundred million, twenty-two thousand, three hundred ninety".