1438894747 has 8 divisors (see below), whose sum is σ = 1461272400. Its totient is φ = 1416543744.

The previous prime is 1438894741. The next prime is 1438894763. The reversal of 1438894747 is 7474988341.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1438894747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1438894741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120879 + ... + 132247.

It is an arithmetic number, because the mean of its divisors is an integer number (182659050).

Almost surely, 2^1438894747 is an apocalyptic number.

1438894747 is a deficient number, since it is larger than the sum of its proper divisors (22377653).

1438894747 is a wasteful number, since it uses less digits than its factorization.

1438894747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13325.

The product of its digits is 5419008, while the sum is 55.

The square root of 1438894747 is about 37932.7661395791. The cubic root of 1438894747 is about 1128.9542487938.

The spelling of 1438894747 in words is "one billion, four hundred thirty-eight million, eight hundred ninety-four thousand, seven hundred forty-seven".