439848830521 has 9 divisors (see below), whose sum is σ = 446178904399. Its totient is φ = 433607351800.

The previous prime is 439848830513. The next prime is 439848830599. The reversal of 439848830521 is 125038848934.

The square root of 439848830521 is 663211.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 131579582121 + 308269248400 = 362739^2 + 555220^2 .

It is not a de Polignac number, because 439848830521 - 2³ = 439848830513 is a prime.

It is a super-2 number, since 2×439848830521² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (439848830501) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 47083311 + ... + 47092651.

Almost surely, 2^439848830521 is an apocalyptic number.

439848830521 is the 663211-st square number.

439848830521 is the 331606-th centered octagonal number.

It is an amenable number.

439848830521 is a deficient number, since it is larger than the sum of its proper divisors (6330073878).

439848830521 is an frugal number, since it uses more digits than its factorization.

439848830521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18824 (or 9412 counting only the distinct ones).

The product of its (nonzero) digits is 6635520, while the sum is 55.

The spelling of 439848830521 in words is "four hundred thirty-nine billion, eight hundred forty-eight million, eight hundred thirty thousand, five hundred twenty-one".