1987515338 has 16 divisors (see below), whose sum is σ = 3116405760. Its totient is φ = 949525200.

The previous prime is 1987515331. The next prime is 1987515371. The reversal of 1987515338 is 8335157891.

It is not an unprimeable number, because it can be changed into a prime (1987515331) 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, 197993 + ... + 207788.

It is an arithmetic number, because the mean of its divisors is an integer number (194775360).

Almost surely, 2^1987515338 is an apocalyptic number.

1987515338 is a deficient number, since it is larger than the sum of its proper divisors (1128890422).

1987515338 is a wasteful number, since it uses less digits than its factorization.

1987515338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405893.

The product of its digits is 907200, while the sum is 50.

The square root of 1987515338 is about 44581.5582724516. The cubic root of 1987515338 is about 1257.2939611600.

The spelling of 1987515338 in words is "one billion, nine hundred eighty-seven million, five hundred fifteen thousand, three hundred thirty-eight".