404740978 has 16 divisors (see below), whose sum is σ = 620507160. Its totient is φ = 197942400.

The previous prime is 404740969. The next prime is 404740979. The reversal of 404740978 is 879047404.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 105001009 + 299739969 = 10247^2 + 17313^2 .

It is not an unprimeable number, because it can be changed into a prime (404740979) 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 7 ways as a sum of consecutive naturals, for example, 12918 + ... + 31246.

Almost surely, 2^404740978 is an apocalyptic number.

404740978 is a deficient number, since it is larger than the sum of its proper divisors (215766182).

404740978 is a wasteful number, since it uses less digits than its factorization.

404740978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18573.

The product of its (nonzero) digits is 225792, while the sum is 43.

The square root of 404740978 is about 20118.1753148739. The cubic root of 404740978 is about 739.7058594802.

The spelling of 404740978 in words is "four hundred four million, seven hundred forty thousand, nine hundred seventy-eight".