442120640 has 56 divisors (see below), whose sum is σ = 1133795040. Its totient is φ = 163243008.

The previous prime is 442120579. The next prime is 442120661. The reversal of 442120640 is 46021244.

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, 48980 + ... + 57299.

It is an arithmetic number, because the mean of its divisors is an integer number (20246340).

Almost surely, 2^442120640 is an apocalyptic number.

442120640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

442120640 is an abundant number, since it is smaller than the sum of its proper divisors (691674400).

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

442120640 is a wasteful number, since it uses less digits than its factorization.

442120640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106309 (or 106299 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 442120640 is about 21026.6649756922. The cubic root of 442120640 is about 761.8104575145.

Adding to 442120640 its reverse (46021244), we get a palindrome (488141884).

The spelling of 442120640 in words is "four hundred forty-two million, one hundred twenty thousand, six hundred forty".