400016290 has 32 divisors (see below), whose sum is σ = 769544064. Its totient is φ = 149180160.

The previous prime is 400016261. The next prime is 400016293. The reversal of 400016290 is 92610004.

It is not an unprimeable number, because it can be changed into a prime (400016293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7195 + ... + 29185.

It is an arithmetic number, because the mean of its divisors is an integer number (24048252).

Almost surely, 2^400016290 is an apocalyptic number.

400016290 is a deficient number, since it is larger than the sum of its proper divisors (369527774).

400016290 is a wasteful number, since it uses less digits than its factorization.

400016290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22122.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 400016290 is about 20000.4072458538. The cubic root of 400016290 is about 736.8163017378.

Adding to 400016290 its reverse (92610004), we get a palindrome (492626294).

The spelling of 400016290 in words is "four hundred million, sixteen thousand, two hundred ninety".