1338015987 has 48 divisors (see below), whose sum is σ = 2413082880. Its totient is φ = 694065600.

The previous prime is 1338015979. The next prime is 1338016003. The reversal of 1338015987 is 7895108331.

It is not a de Polignac number, because 1338015987 - 2³ = 1338015979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1338013987) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 850912 + ... + 852482.

It is an arithmetic number, because the mean of its divisors is an integer number (50272560).

Almost surely, 2^1338015987 is an apocalyptic number.

1338015987 is a deficient number, since it is larger than the sum of its proper divisors (1075066893).

1338015987 is a wasteful number, since it uses less digits than its factorization.

1338015987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2824 (or 2821 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The square root of 1338015987 is about 36578.9008446126. The cubic root of 1338015987 is about 1101.9293926674.

The spelling of 1338015987 in words is "one billion, three hundred thirty-eight million, fifteen thousand, nine hundred eighty-seven".