403243220 has 24 divisors (see below), whose sum is σ = 847300608. Its totient is φ = 161204000.

The previous prime is 403243219. The next prime is 403243223. The reversal of 403243220 is 22342304.

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

It is a junction number, because it is equal to n+sod(n) for n = 403243192 and 403243201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (403243223) 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, 37445 + ... + 46995.

It is an arithmetic number, because the mean of its divisors is an integer number (35304192).

Almost surely, 2^403243220 is an apocalyptic number.

It is an amenable number.

403243220 is an abundant number, since it is smaller than the sum of its proper divisors (444057388).

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

403243220 is a wasteful number, since it uses less digits than its factorization.

403243220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11671 (or 11669 counting only the distinct ones).

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

The square root of 403243220 is about 20080.9168117394. The cubic root of 403243220 is about 738.7922959475.

Adding to 403243220 its reverse (22342304), we get a palindrome (425585524).

The spelling of 403243220 in words is "four hundred three million, two hundred forty-three thousand, two hundred twenty".