404479370420 has 18 divisors (see below), whose sum is σ = 849412650786. Its totient is φ = 161790610480.

The previous prime is 404479370419. The next prime is 404479370429. The reversal of 404479370420 is 24073974404.

It can be written as a sum of positive squares in only one way, i.e., 323583496336 + 80895874084 = 568844^2 + 284422^2 .

It is a super-2 number, since 2×404479370420² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404479370429) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2773115 + ... + 2915325.

Almost surely, 2^404479370420 is an apocalyptic number.

It is an amenable number.

404479370420 is an abundant number, since it is smaller than the sum of its proper divisors (444933280366).

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

404479370420 is an frugal number, since it uses more digits than its factorization.

404479370420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284431 (or 142218 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 44.

The spelling of 404479370420 in words is "four hundred four billion, four hundred seventy-nine million, three hundred seventy thousand, four hundred twenty".