442720019 has 8 divisors (see below), whose sum is σ = 506261088. Its totient is φ = 379252800.

The previous prime is 442720013. The next prime is 442720043. The reversal of 442720019 is 910027244.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-442720019 is a prime.

It is a super-2 number, since 2×442720019² = 392002030446720722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 442719973 and 442720000.

It is not an unprimeable number, because it can be changed into a prime (442720013) 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, 4952 + ... + 30165.

It is an arithmetic number, because the mean of its divisors is an integer number (63282636).

Almost surely, 2^442720019 is an apocalyptic number.

442720019 is a deficient number, since it is larger than the sum of its proper divisors (63541069).

442720019 is a wasteful number, since it uses less digits than its factorization.

442720019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36925.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 442720019 is about 21040.9129792412. The cubic root of 442720019 is about 762.1545619376.

The spelling of 442720019 in words is "four hundred forty-two million, seven hundred twenty thousand, nineteen".