1002038987 has 8 divisors (see below), whose sum is σ = 1008483840. Its totient is φ = 995604480.

The previous prime is 1002038969. The next prime is 1002039029. The reversal of 1002038987 is 7898302001.

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 1002038987 - 2¹⁶ = 1001973451 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1002038987.

It is not an unprimeable number, because it can be changed into a prime (1002032987) 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, 299339 + ... + 302667.

It is an arithmetic number, because the mean of its divisors is an integer number (126060480).

Almost surely, 2^1002038987 is an apocalyptic number.

1002038987 is a deficient number, since it is larger than the sum of its proper divisors (6444853).

1002038987 is a wasteful number, since it uses less digits than its factorization.

1002038987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5173.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 1002038987 is about 31654.9993997789. Note that the first 3 decimals coincide. The cubic root of 1002038987 is about 1000.6792009150.

Adding to 1002038987 its sum of digits (38), we get a square (1002039025 = 31655²).

The spelling of 1002038987 in words is "one billion, two million, thirty-eight thousand, nine hundred eighty-seven".