404011240 has 32 divisors (see below), whose sum is σ = 914829480. Its totient is φ = 160572672.

The previous prime is 404011207. The next prime is 404011247. The reversal of 404011240 is 42110404.

It can be written as a sum of positive squares in 4 ways, for example, as 379548324 + 24462916 = 19482^2 + 4946^2 .

It is not an unprimeable number, because it can be changed into a prime (404011247) 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, 25887 + ... + 38446.

Almost surely, 2^404011240 is an apocalyptic number.

404011240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

404011240 is an abundant number, since it is smaller than the sum of its proper divisors (510818240).

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

404011240 is a wasteful number, since it uses less digits than its factorization.

404011240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64501 (or 64497 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 404011240 is about 20100.0308457475. The cubic root of 404011240 is about 739.2610348974.

Adding to 404011240 its reverse (42110404), we get a palindrome (446121644).

The spelling of 404011240 in words is "four hundred four million, eleven thousand, two hundred forty".