442421099 has 24 divisors (see below), whose sum is σ = 487272240. Its totient is φ = 400495104.

The previous prime is 442421059. The next prime is 442421101. The reversal of 442421099 is 990124244.

It is a happy number.

It is not a de Polignac number, because 442421099 - 2²⁰ = 441372523 is a prime.

It is not an unprimeable number, because it can be changed into a prime (442421029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1898687 + ... + 1898919.

It is an arithmetic number, because the mean of its divisors is an integer number (20303010).

Almost surely, 2^442421099 is an apocalyptic number.

442421099 is a deficient number, since it is larger than the sum of its proper divisors (44851141).

442421099 is a wasteful number, since it uses less digits than its factorization.

442421099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399 (or 362 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 442421099 is about 21033.8084758800. The cubic root of 442421099 is about 761.9829903455.

The spelling of 442421099 in words is "four hundred forty-two million, four hundred twenty-one thousand, ninety-nine".