439330642 has 4 divisors (see below), whose sum is σ = 658995966. Its totient is φ = 219665320.

The previous prime is 439330607. The next prime is 439330649. The reversal of 439330642 is 246033934.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 246033934 = 2 ⋅123016967.

It can be written as a sum of positive squares in only one way, i.e., 322884961 + 116445681 = 17969^2 + 10791^2 .

It is a super-2 number, since 2×439330642² = 386022826000264328, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 439330598 and 439330607.

It is not an unprimeable number, because it can be changed into a prime (439330649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109832659 + ... + 109832662.

Almost surely, 2^439330642 is an apocalyptic number.

439330642 is a deficient number, since it is larger than the sum of its proper divisors (219665324).

439330642 is a wasteful number, since it uses less digits than its factorization.

439330642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219665323.

The product of its (nonzero) digits is 46656, while the sum is 34.

The square root of 439330642 is about 20960.2156954550. The cubic root of 439330642 is about 760.2046090371.

The spelling of 439330642 in words is "four hundred thirty-nine million, three hundred thirty thousand, six hundred forty-two".