442787997 has 8 divisors (see below), whose sum is σ = 598471744. Its totient is φ = 291148128.

The previous prime is 442787993. The next prime is 442787999. The reversal of 442787997 is 799787244.

It is a happy number.

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

It is not a de Polignac number, because 442787997 - 2² = 442787993 is a prime.

It is a super-2 number, since 2×442787997² = 392122420574544018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442787993) 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, 1010713 + ... + 1011150.

It is an arithmetic number, because the mean of its divisors is an integer number (74808968).

Almost surely, 2^442787997 is an apocalyptic number.

It is an amenable number.

442787997 is a deficient number, since it is larger than the sum of its proper divisors (155683747).

442787997 is a wasteful number, since it uses less digits than its factorization.

442787997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2021939.

The product of its digits is 7112448, while the sum is 57.

The square root of 442787997 is about 21042.5282939099. The cubic root of 442787997 is about 762.1935686003.

The spelling of 442787997 in words is "four hundred forty-two million, seven hundred eighty-seven thousand, nine hundred ninety-seven".