409217420 has 12 divisors (see below), whose sum is σ = 859356624. Its totient is φ = 163686960.

The previous prime is 409217381. The next prime is 409217429. The reversal of 409217420 is 24712904.

It is not an unprimeable number, because it can be changed into a prime (409217429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10230416 + ... + 10230455.

It is an arithmetic number, because the mean of its divisors is an integer number (71613052).

Almost surely, 2^409217420 is an apocalyptic number.

It is an amenable number.

409217420 is an abundant number, since it is smaller than the sum of its proper divisors (450139204).

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

409217420 is a wasteful number, since it uses less digits than its factorization.

409217420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20460880 (or 20460878 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 409217420 is about 20229.1230655212. The cubic root of 409217420 is about 742.4229201200.

It can be divided in two parts, 4092 and 17420, that added together give a palindrome (21512).

The spelling of 409217420 in words is "four hundred nine million, two hundred seventeen thousand, four hundred twenty".