442449997 has 8 divisors (see below), whose sum is σ = 482987232. Its totient is φ = 401965200.

The previous prime is 442449961. The next prime is 442450003. The reversal of 442449997 is 799944244.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 442449997 - 2¹⁹ = 441925709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442449907) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5722 + ... + 30292.

It is an arithmetic number, because the mean of its divisors is an integer number (60373404).

Almost surely, 2^442449997 is an apocalyptic number.

It is an amenable number.

442449997 is a deficient number, since it is larger than the sum of its proper divisors (40537235).

442449997 is a wasteful number, since it uses less digits than its factorization.

442449997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26219.

The product of its digits is 2612736, while the sum is 52.

The square root of 442449997 is about 21034.4954063557. The cubic root of 442449997 is about 761.9995803508. Note that the first 3 decimals are identical.

The spelling of 442449997 in words is "four hundred forty-two million, four hundred forty-nine thousand, nine hundred ninety-seven".