403243020 has 144 divisors (see below), whose sum is σ = 1266789888. Its totient is φ = 103749120.

The previous prime is 403243013. The next prime is 403243037. The reversal of 403243020 is 20342304.

403243020 is a `hidden beast` number, since 40 + 324 + 302 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 403242984 and 403243002.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1271902 + ... + 1272218.

It is an arithmetic number, because the mean of its divisors is an integer number (8797152).

Almost surely, 2^403243020 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 403243020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (633394944).

403243020 is an abundant number, since it is smaller than the sum of its proper divisors (863546868).

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

403243020 is a wasteful number, since it uses less digits than its factorization.

403243020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560 (or 555 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 18.

The square root of 403243020 is about 20080.9118318865. The cubic root of 403243020 is about 738.7921738058.

Adding to 403243020 its reverse (20342304), we get a palindrome (423585324).

The spelling of 403243020 in words is "four hundred three million, two hundred forty-three thousand, twenty".