404723641 has 8 divisors (see below), whose sum is σ = 489749760. Its totient is φ = 326499648.

The previous prime is 404723629. The next prime is 404723647. The reversal of 404723641 is 146327404.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 404723641 - 2⁵ = 404723609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (404723647) 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, 1700401 + ... + 1700638.

It is an arithmetic number, because the mean of its divisors is an integer number (61218720).

Almost surely, 2^404723641 is an apocalyptic number.

It is an amenable number.

404723641 is a deficient number, since it is larger than the sum of its proper divisors (85026119).

404723641 is a wasteful number, since it uses less digits than its factorization.

404723641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3401063.

The product of its (nonzero) digits is 16128, while the sum is 31.

The square root of 404723641 is about 20117.7444312229. The cubic root of 404723641 is about 739.6952976112.

The spelling of 404723641 in words is "four hundred four million, seven hundred twenty-three thousand, six hundred forty-one".