442640460 has 48 divisors (see below), whose sum is σ = 1243914336. Its totient is φ = 117606912.

The previous prime is 442640453. The next prime is 442640491. The reversal of 442640460 is 64046244.

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

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 3304 + ... + 29936.

It is an arithmetic number, because the mean of its divisors is an integer number (25914882).

Almost surely, 2^442640460 is an apocalyptic number.

It is an amenable number.

442640460 is an abundant number, since it is smaller than the sum of its proper divisors (801273876).

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

442640460 is a wasteful number, since it uses less digits than its factorization.

442640460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26922 (or 26920 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 30.

The square root of 442640460 is about 21039.0223156876. The cubic root of 442640460 is about 762.1089048747.

The spelling of 442640460 in words is "four hundred forty-two million, six hundred forty thousand, four hundred sixty".