442191430 has 24 divisors (see below), whose sum is σ = 809727552. Its totient is φ = 173864976.

The previous prime is 442191419. The next prime is 442191439. The reversal of 442191430 is 34191244.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442191439) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28459 + ... + 41161.

It is an arithmetic number, because the mean of its divisors is an integer number (33738648).

Almost surely, 2^442191430 is an apocalyptic number.

442191430 is a deficient number, since it is larger than the sum of its proper divisors (367536122).

442191430 is a wasteful number, since it uses less digits than its factorization.

442191430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12828 (or 12769 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 442191430 is about 21028.3482470688. The cubic root of 442191430 is about 761.8511143545.

The spelling of 442191430 in words is "four hundred forty-two million, one hundred ninety-one thousand, four hundred thirty".