404995540 has 24 divisors (see below), whose sum is σ = 871236072. Its totient is φ = 158046720.

The previous prime is 404995489. The next prime is 404995553. The reversal of 404995540 is 45599404.

It can be written as a sum of positive squares in 4 ways, for example, as 20164 + 404975376 = 142^2 + 20124^2 .

It is a junction number, because it is equal to n+sod(n) for n = 404995493 and 404995502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 246129 + ... + 247768.

It is an arithmetic number, because the mean of its divisors is an integer number (36301503).

Almost surely, 2^404995540 is an apocalyptic number.

It is an amenable number.

404995540 is an abundant number, since it is smaller than the sum of its proper divisors (466240532).

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

404995540 is a wasteful number, since it uses less digits than its factorization.

404995540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493947 (or 493945 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 40.

The square root of 404995540 is about 20124.5009876022. The cubic root of 404995540 is about 739.8609064112.

The spelling of 404995540 in words is "four hundred four million, nine hundred ninety-five thousand, five hundred forty".