404344778 has 4 divisors (see below), whose sum is σ = 606517170. Its totient is φ = 202172388.

The previous prime is 404344777. The next prime is 404344789. The reversal of 404344778 is 877443404.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 399880009 + 4464769 = 19997^2 + 2113^2 .

It is not an unprimeable number, because it can be changed into a prime (404344771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101086193 + ... + 101086196.

Almost surely, 2^404344778 is an apocalyptic number.

404344778 is a deficient number, since it is larger than the sum of its proper divisors (202172392).

404344778 is a wasteful number, since it uses less digits than its factorization.

404344778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202172391.

The product of its (nonzero) digits is 301056, while the sum is 41.

The square root of 404344778 is about 20108.3260864747. The cubic root of 404344778 is about 739.4644152327.

The spelling of 404344778 in words is "four hundred four million, three hundred forty-four thousand, seven hundred seventy-eight".