404124240 has 80 divisors (see below), whose sum is σ = 1349163648. Its totient is φ = 99475968.

The previous prime is 404124233. The next prime is 404124257. The reversal of 404124240 is 42421404.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61644 + ... + 67883.

Almost surely, 2^404124240 is an apocalyptic number.

404124240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

404124240 is an abundant number, since it is smaller than the sum of its proper divisors (945039408).

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

404124240 is a wasteful number, since it uses less digits than its factorization.

404124240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129556 (or 129550 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 21.

The square root of 404124240 is about 20102.8415901832. The cubic root of 404124240 is about 739.3299510575.

Adding to 404124240 its reverse (42421404), we get a palindrome (446545644).

The spelling of 404124240 in words is "four hundred four million, one hundred twenty-four thousand, two hundred forty".