442689645 has 32 divisors (see below), whose sum is σ = 765751680. Its totient is φ = 217624320.

The previous prime is 442689613. The next prime is 442689659. The reversal of 442689645 is 546986244.

It is not a de Polignac number, because 442689645 - 2⁵ = 442689613 is a prime.

It is a super-3 number, since 3×442689645³ (a number of 27 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 442689594 and 442689603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10446 + ... + 31535.

It is an arithmetic number, because the mean of its divisors is an integer number (23929740).

Almost surely, 2^442689645 is an apocalyptic number.

It is an amenable number.

442689645 is a deficient number, since it is larger than the sum of its proper divisors (323062035).

442689645 is a wasteful number, since it uses less digits than its factorization.

442689645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42045.

The product of its digits is 1658880, while the sum is 48.

The square root of 442689645 is about 21040.1911825915. The cubic root of 442689645 is about 762.1371316498.

The spelling of 442689645 in words is "four hundred forty-two million, six hundred eighty-nine thousand, six hundred forty-five".