403402240 has 40 divisors (see below), whose sum is σ = 967226040. Its totient is φ = 161359872.

The previous prime is 403402229. The next prime is 403402261. The reversal of 403402240 is 42204304.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76230 + ... + 81349.

It is an arithmetic number, because the mean of its divisors is an integer number (24180651).

Almost surely, 2^403402240 is an apocalyptic number.

403402240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

403402240 is an abundant number, since it is smaller than the sum of its proper divisors (563823800).

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

403402240 is an equidigital number, since it uses as much as digits as its factorization.

403402240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157602 (or 157586 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 403402240 is about 20084.8759020314. The cubic root of 403402240 is about 738.8893980646.

Adding to 403402240 its reverse (42204304), we get a palindrome (445606544).

The spelling of 403402240 in words is "four hundred three million, four hundred two thousand, two hundred forty".