442905380 has 12 divisors (see below), whose sum is σ = 930101340. Its totient is φ = 177162144.

The previous prime is 442905377. The next prime is 442905383. The reversal of 442905380 is 83509244.

It is an interprime number because it is at equal distance from previous prime (442905377) and next prime (442905383).

It can be written as a sum of positive squares in 2 ways, for example, as 73650724 + 369254656 = 8582^2 + 19216^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 442905380.

It is not an unprimeable number, because it can be changed into a prime (442905383) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 11072615 + ... + 11072654.

It is an arithmetic number, because the mean of its divisors is an integer number (77508445).

Almost surely, 2^442905380 is an apocalyptic number.

It is an amenable number.

442905380 is an abundant number, since it is smaller than the sum of its proper divisors (487195960).

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

442905380 is a wasteful number, since it uses less digits than its factorization.

442905380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22145278 (or 22145276 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 442905380 is about 21045.3172938780. The cubic root of 442905380 is about 762.2609150983.

The spelling of 442905380 in words is "four hundred forty-two million, nine hundred five thousand, three hundred eighty".