404445460 has 24 divisors (see below), whose sum is σ = 850174920. Its totient is φ = 161618304.

The previous prime is 404445439. The next prime is 404445463. The reversal of 404445460 is 64544404.

It can be written as a sum of positive squares in 4 ways, for example, as 83247376 + 321198084 = 9124^2 + 17922^2 .

It is a super-2 number, since 2×404445460² = 327152260229223200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404445463) 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, 11922 + ... + 30838.

It is an arithmetic number, because the mean of its divisors is an integer number (35423955).

Almost surely, 2^404445460 is an apocalyptic number.

It is an amenable number.

404445460 is an abundant number, since it is smaller than the sum of its proper divisors (445729460).

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

404445460 is a wasteful number, since it uses less digits than its factorization.

404445460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19995 (or 19993 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 31.

The square root of 404445460 is about 20110.8294209861. The cubic root of 404445460 is about 739.5257857773.

Adding to 404445460 its reverse (64544404), we get a palindrome (468989864).

The spelling of 404445460 in words is "four hundred four million, four hundred forty-five thousand, four hundred sixty".