403230440 has 32 divisors (see below), whose sum is σ = 931792680. Its totient is φ = 156932352.

The previous prime is 403230439. The next prime is 403230467. The reversal of 403230440 is 44032304.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 397364356 + 5866084 = 19934^2 + 2422^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134747 + ... + 137706.

Almost surely, 2^403230440 is an apocalyptic number.

403230440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

403230440 is an abundant number, since it is smaller than the sum of its proper divisors (528562240).

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

403230440 is a wasteful number, since it uses less digits than its factorization.

403230440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272501 (or 272497 counting only the distinct ones).

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

The square root of 403230440 is about 20080.5985966554. The cubic root of 403230440 is about 738.7844910092.

Adding to 403230440 its reverse (44032304), we get a palindrome (447262744).

The spelling of 403230440 in words is "four hundred three million, two hundred thirty thousand, four hundred forty".