442102020 has 24 divisors (see below), whose sum is σ = 1237885824. Its totient is φ = 117893856.

The previous prime is 442102007. The next prime is 442102027. The reversal of 442102020 is 20201244.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (442102027) 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 7 ways as a sum of consecutive naturals, for example, 3684124 + ... + 3684243.

It is an arithmetic number, because the mean of its divisors is an integer number (51578576).

Almost surely, 2^442102020 is an apocalyptic number.

It is an amenable number.

442102020 is an abundant number, since it is smaller than the sum of its proper divisors (795783804).

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

442102020 is a wasteful number, since it uses less digits than its factorization.

442102020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7368379 (or 7368377 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 442102020 is about 21026.2221999103. Note that the first 3 decimals coincide. The cubic root of 442102020 is about 761.7997627640.

Adding to 442102020 its reverse (20201244), we get a palindrome (462303264).

The spelling of 442102020 in words is "four hundred forty-two million, one hundred two thousand, twenty".