404454029668 has 24 divisors (see below), whose sum is σ = 762415021368. Its totient is φ = 186628298496.

The previous prime is 404454029663. The next prime is 404454029677. The reversal of 404454029668 is 866920454404.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 9539819584 + 394914210084 = 97672^2 + 628422^2 .

It is a super-2 number, since 2×404454029668² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is not an unprimeable number, because it can be changed into a prime (404454029663) 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, 661921 + ... + 1116712.

It is an arithmetic number, because the mean of its divisors is an integer number (31767292557).

Almost surely, 2^404454029668 is an apocalyptic number.

It is an amenable number.

404454029668 is a deficient number, since it is larger than the sum of its proper divisors (357960991700).

404454029668 is a wasteful number, since it uses less digits than its factorization.

404454029668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1783023 (or 1783021 counting only the distinct ones).

The product of its (nonzero) digits is 6635520, while the sum is 52.

The spelling of 404454029668 in words is "four hundred four billion, four hundred fifty-four million, twenty-nine thousand, six hundred sixty-eight".