421520308 has 48 divisors (see below), whose sum is σ = 822427200. Its totient is φ = 187418880.

The previous prime is 421520279. The next prime is 421520311. The reversal of 421520308 is 803025124.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1030408 + ... + 1030816.

It is an arithmetic number, because the mean of its divisors is an integer number (17133900).

Almost surely, 2^421520308 is an apocalyptic number.

It is an amenable number.

421520308 is a deficient number, since it is larger than the sum of its proper divisors (400906892).

421520308 is a wasteful number, since it uses less digits than its factorization.

421520308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 880 (or 878 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 421520308 is about 20530.9597437626. The cubic root of 421520308 is about 749.7897532154.

The spelling of 421520308 in words is "four hundred twenty-one million, five hundred twenty thousand, three hundred eight".