403043240 has 16 divisors (see below), whose sum is σ = 906847380. Its totient is φ = 161217280.

The previous prime is 403043203. The next prime is 403043261. The reversal of 403043240 is 42340304.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 393070276 + 9972964 = 19826^2 + 3158^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5038001 + ... + 5038080.

Almost surely, 2^403043240 is an apocalyptic number.

403043240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

403043240 is an abundant number, since it is smaller than the sum of its proper divisors (503804140).

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

403043240 is a wasteful number, since it uses less digits than its factorization.

403043240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10076092 (or 10076088 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 20.

The square root of 403043240 is about 20075.9368399086. The cubic root of 403043240 is about 738.6701462487.

Adding to 403043240 its reverse (42340304), we get a palindrome (445383544).

The spelling of 403043240 in words is "four hundred three million, forty-three thousand, two hundred forty".