439378644 has 48 divisors (see below), whose sum is σ = 1051413440. Its totient is φ = 142732800.

The previous prime is 439378633. The next prime is 439378661. The reversal of 439378644 is 446873934.

It is a super-3 number, since 3×439378644³ (a number of 27 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 439378593 and 439378602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 365244 + ... + 366444.

Almost surely, 2^439378644 is an apocalyptic number.

It is an amenable number.

439378644 is an abundant number, since it is smaller than the sum of its proper divisors (612034796).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

439378644 is a wasteful number, since it uses less digits than its factorization.

439378644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1960 (or 1958 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 48.

The square root of 439378644 is about 20961.3607382727. The cubic root of 439378644 is about 760.2322951041.

The spelling of 439378644 in words is "four hundred thirty-nine million, three hundred seventy-eight thousand, six hundred forty-four".