424409881 has 4 divisors (see below), whose sum is σ = 485039872. Its totient is φ = 363779892.

The previous prime is 424409873. The next prime is 424409929. The reversal of 424409881 is 188904424.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 424409881 - 2³ = 424409873 is a prime.

It is a super-2 number, since 2×424409881² = 360247494180868322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (424409851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30314985 + ... + 30314998.

It is an arithmetic number, because the mean of its divisors is an integer number (121259968).

Almost surely, 2^424409881 is an apocalyptic number.

It is an amenable number.

424409881 is a deficient number, since it is larger than the sum of its proper divisors (60629991).

424409881 is an equidigital number, since it uses as much as digits as its factorization.

424409881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60629990.

The product of its (nonzero) digits is 73728, while the sum is 40.

The square root of 424409881 is about 20601.2106683078. The cubic root of 424409881 is about 751.4991530938.

Adding to 424409881 its product of nonzero digits (73728), we get a square (424483609 = 20603²).

The spelling of 424409881 in words is "four hundred twenty-four million, four hundred nine thousand, eight hundred eighty-one".