404444623 has 16 divisors (see below), whose sum is σ = 452928672. Its totient is φ = 357952000.

The previous prime is 404444611. The next prime is 404444647. The reversal of 404444623 is 326444404.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-404444623 is a prime.

It is a super-2 number, since 2×404444623² = 327150906147224258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404444123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 423915 + ... + 424867.

It is an arithmetic number, because the mean of its divisors is an integer number (28308042).

Almost surely, 2^404444623 is an apocalyptic number.

404444623 is a deficient number, since it is larger than the sum of its proper divisors (48484049).

404444623 is a wasteful number, since it uses less digits than its factorization.

404444623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1946.

The product of its (nonzero) digits is 36864, while the sum is 31.

The square root of 404444623 is about 20110.8086112916. The cubic root of 404444623 is about 739.5252756274.

The spelling of 404444623 in words is "four hundred four million, four hundred forty-four thousand, six hundred twenty-three".