404612778 has 16 divisors (see below), whose sum is σ = 814658400. Its totient is φ = 133965456.

The previous prime is 404612773. The next prime is 404612807. The reversal of 404612778 is 877216404.

It is not an unprimeable number, because it can be changed into a prime (404612773) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 225400 + ... + 227187.

It is an arithmetic number, because the mean of its divisors is an integer number (50916150).

Almost surely, 2^404612778 is an apocalyptic number.

404612778 is an abundant number, since it is smaller than the sum of its proper divisors (410045622).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

404612778 is a wasteful number, since it uses less digits than its factorization.

404612778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452741.

The product of its (nonzero) digits is 75264, while the sum is 39.

The square root of 404612778 is about 20114.9888888858. The cubic root of 404612778 is about 739.6277516611.

The spelling of 404612778 in words is "four hundred four million, six hundred twelve thousand, seven hundred seventy-eight".