403231220 has 24 divisors (see below), whose sum is σ = 967755264. Its totient is φ = 138250656.

The previous prime is 403231207. The next prime is 403231271. The reversal of 403231220 is 22132304.

It is a congruent number.

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, 1439972 + ... + 1440251.

It is an arithmetic number, because the mean of its divisors is an integer number (40323136).

Almost surely, 2^403231220 is an apocalyptic number.

It is an amenable number.

403231220 is an abundant number, since it is smaller than the sum of its proper divisors (564524044).

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

403231220 is a wasteful number, since it uses less digits than its factorization.

403231220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2880239 (or 2880237 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 403231220 is about 20080.6180183778. The cubic root of 403231220 is about 738.7849673717.

Adding to 403231220 its reverse (22132304), we get a palindrome (425363524).

The spelling of 403231220 in words is "four hundred three million, two hundred thirty-one thousand, two hundred twenty".