1438994315 has 24 divisors (see below), whose sum is σ = 1915870320. Its totient is φ = 1036713920.

The previous prime is 1438994311. The next prime is 1438994327. The reversal of 1438994315 is 5134998341.

It is not a de Polignac number, because 1438994315 - 2² = 1438994311 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1438994315.

It is not an unprimeable number, because it can be changed into a prime (1438994311) 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 23 ways as a sum of consecutive naturals, for example, 53621 + ... + 75849.

It is an arithmetic number, because the mean of its divisors is an integer number (79827930).

Almost surely, 2^1438994315 is an apocalyptic number.

1438994315 is a deficient number, since it is larger than the sum of its proper divisors (476876005).

1438994315 is a wasteful number, since it uses less digits than its factorization.

1438994315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22363 (or 22352 counting only the distinct ones).

The product of its digits is 466560, while the sum is 47.

The square root of 1438994315 is about 37934.0785442325. The cubic root of 1438994315 is about 1128.9802884849.

The spelling of 1438994315 in words is "one billion, four hundred thirty-eight million, nine hundred ninety-four thousand, three hundred fifteen".