451446420 has 24 divisors (see below), whose sum is σ = 1264050144. Its totient is φ = 120385696.

The previous prime is 451446419. The next prime is 451446431. The reversal of 451446420 is 24644154.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3761994 + ... + 3762113.

It is an arithmetic number, because the mean of its divisors is an integer number (52668756).

Almost surely, 2^451446420 is an apocalyptic number.

It is an amenable number.

451446420 is an abundant number, since it is smaller than the sum of its proper divisors (812603724).

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

451446420 is a wasteful number, since it uses less digits than its factorization.

451446420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7524119 (or 7524117 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 30.

The square root of 451446420 is about 21247.2685303311. The cubic root of 451446420 is about 767.1295952345.

The spelling of 451446420 in words is "four hundred fifty-one million, four hundred forty-six thousand, four hundred twenty".