1439972387 has 8 divisors (see below), whose sum is σ = 1652747616. Its totient is φ = 1228963392.

The previous prime is 1439972299. The next prime is 1439972393. The reversal of 1439972387 is 7832799341.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1439972387 - 2¹⁸ = 1439710243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1439972587) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 439808 + ... + 443069.

It is an arithmetic number, because the mean of its divisors is an integer number (206593452).

Almost surely, 2^1439972387 is an apocalyptic number.

1439972387 is a deficient number, since it is larger than the sum of its proper divisors (212775229).

1439972387 is an equidigital number, since it uses as much as digits as its factorization.

1439972387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 883117.

The product of its digits is 2286144, while the sum is 53.

The square root of 1439972387 is about 37946.9680870554. The cubic root of 1439972387 is about 1129.2360166034.

The spelling of 1439972387 in words is "one billion, four hundred thirty-nine million, nine hundred seventy-two thousand, three hundred eighty-seven".