1439072964 has 90 divisors (see below), whose sum is σ = 4243935150. Its totient is φ = 411139008.

The previous prime is 1439072963. The next prime is 1439072969. The reversal of 1439072964 is 4692709341.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1350562500 + 88510464 = 36750^2 + 9408^2 .

It is not an unprimeable number, because it can be changed into a prime (1439072963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 78112 + ... + 94760.

It is an arithmetic number, because the mean of its divisors is an integer number (47154835).

Almost surely, 2^1439072964 is an apocalyptic number.

1439072964 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1439072964, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2121967575).

1439072964 is an abundant number, since it is smaller than the sum of its proper divisors (2804862186).

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

1439072964 is a wasteful number, since it uses less digits than its factorization.

1439072964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16687 (or 16661 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The square root of 1439072964 is about 37935.1151836923. The cubic root of 1439072964 is about 1129.0008564497. Note that the first 3 decimals are identical.

The spelling of 1439072964 in words is "one billion, four hundred thirty-nine million, seventy-two thousand, nine hundred sixty-four".