400940194 has 16 divisors (see below), whose sum is σ = 617263200. Its totient is φ = 195253344.

The previous prime is 400940171. The next prime is 400940231. The reversal of 400940194 is 491049004.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 4884 + ... + 28735.

It is an arithmetic number, because the mean of its divisors is an integer number (38578950).

Almost surely, 2^400940194 is an apocalyptic number.

400940194 is a deficient number, since it is larger than the sum of its proper divisors (216323006).

400940194 is a wasteful number, since it uses less digits than its factorization.

400940194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33777.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 400940194 is about 20023.4910542592. The cubic root of 400940194 is about 737.3831320704.

Adding to 400940194 its reverse (491049004), we get a palindrome (891989198).

The spelling of 400940194 in words is "four hundred million, nine hundred forty thousand, one hundred ninety-four".