404635240 has 32 divisors (see below), whose sum is σ = 911493000. Its totient is φ = 161665024.

The previous prime is 404635237. The next prime is 404635279. The reversal of 404635240 is 42536404.

It can be written as a sum of positive squares in 4 ways, for example, as 86155524 + 318479716 = 9282^2 + 17846^2 .

It is a junction number, because it is equal to n+sod(n) for n = 404635199 and 404635208.

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, 31716 + ... + 42604.

Almost surely, 2^404635240 is an apocalyptic number.

404635240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

404635240 is an abundant number, since it is smaller than the sum of its proper divisors (506857760).

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

404635240 is a wasteful number, since it uses less digits than its factorization.

404635240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11829 (or 11825 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 28.

The square root of 404635240 is about 20115.5472209930. The cubic root of 404635240 is about 739.6414381716.

The spelling of 404635240 in words is "four hundred four million, six hundred thirty-five thousand, two hundred forty".