1439708985 has 80 divisors (see below), whose sum is σ = 3032124480. Its totient is φ = 644319360.

The previous prime is 1439708969. The next prime is 1439709049. The reversal of 1439708985 is 5898079341.

It is not a de Polignac number, because 1439708985 - 2⁴ = 1439708969 is a prime.

It is a super-2 number, since 2×1439708985² = 4145523922979460450, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 45486 + ... + 70344.

It is an arithmetic number, because the mean of its divisors is an integer number (37901556).

Almost surely, 2^1439708985 is an apocalyptic number.

1439708985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1439708985 is an abundant number, since it is smaller than the sum of its proper divisors (1592415495).

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

1439708985 is a wasteful number, since it uses less digits than its factorization.

1439708985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24900 (or 24891 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 54.

The square root of 1439708985 is about 37943.4972689656. The cubic root of 1439708985 is about 1129.1671585322.

The spelling of 1439708985 in words is "one billion, four hundred thirty-nine million, seven hundred eight thousand, nine hundred eighty-five".