38987798 has 4 divisors (see below), whose sum is σ = 58481700. Its totient is φ = 19493898.

The previous prime is 38987797. The next prime is 38987813. The reversal of 38987798 is 89778983.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38987797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9746948 + ... + 9746951.

It is an arithmetic number, because the mean of its divisors is an integer number (14620425).

Almost surely, 2^38987798 is an apocalyptic number.

38987798 is a deficient number, since it is larger than the sum of its proper divisors (19493902).

38987798 is a wasteful number, since it uses less digits than its factorization.

38987798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19493901.

The product of its digits is 6096384, while the sum is 59.

The square root of 38987798 is about 6244.0209801057. The cubic root of 38987798 is about 339.0857734653.

The spelling of 38987798 in words is "thirty-eight million, nine hundred eighty-seven thousand, seven hundred ninety-eight".