442621980 has 36 divisors (see below), whose sum is σ = 1342620552. Its totient is φ = 118032480.

The previous prime is 442621951. The next prime is 442621997. The reversal of 442621980 is 89126244.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1229326 + ... + 1229685.

Almost surely, 2^442621980 is an apocalyptic number.

It is an amenable number.

442621980 is an abundant number, since it is smaller than the sum of its proper divisors (899998572).

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

442621980 is a wasteful number, since it uses less digits than its factorization.

442621980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2459026 (or 2459021 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 442621980 is about 21038.5831271975. The cubic root of 442621980 is about 762.0982988488.

The spelling of 442621980 in words is "four hundred forty-two million, six hundred twenty-one thousand, nine hundred eighty".