404066320 has 40 divisors (see below), whose sum is σ = 1073663424. Its totient is φ = 138536832.

The previous prime is 404066317. The next prime is 404066321. The reversal of 404066320 is 23660404.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (404066321) 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, 360214 + ... + 361333.

Almost surely, 2^404066320 is an apocalyptic number.

404066320 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

404066320 is an abundant number, since it is smaller than the sum of its proper divisors (669597104).

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

404066320 is a wasteful number, since it uses less digits than its factorization.

404066320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 721567 (or 721561 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 404066320 is about 20101.4009462027. The cubic root of 404066320 is about 739.2946285564.

The spelling of 404066320 in words is "four hundred four million, sixty-six thousand, three hundred twenty".