442839649 has 16 divisors (see below), whose sum is σ = 516371328. Its totient is φ = 371935872.

The previous prime is 442839637. The next prime is 442839653. The reversal of 442839649 is 946938244.

It is not a de Polignac number, because 442839649 - 2⁷ = 442839521 is a prime.

It is a super-2 number, since 2×442839649² = 392213909452886402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (442839659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89997 + ... + 94789.

It is an arithmetic number, because the mean of its divisors is an integer number (32273208).

Almost surely, 2^442839649 is an apocalyptic number.

It is an amenable number.

442839649 is a deficient number, since it is larger than the sum of its proper divisors (73531679).

442839649 is a wasteful number, since it uses less digits than its factorization.

442839649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5064.

The product of its digits is 1492992, while the sum is 49.

The square root of 442839649 is about 21043.7555821198. The cubic root of 442839649 is about 762.2232045222.

The spelling of 442839649 in words is "four hundred forty-two million, eight hundred thirty-nine thousand, six hundred forty-nine".