38987243 has 4 divisors (see below), whose sum is σ = 40244928. Its totient is φ = 37729560.

The previous prime is 38987237. The next prime is 38987279. The reversal of 38987243 is 34278983.

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

It is a cyclic number.

It is not a de Polignac number, because 38987243 - 2⁴ = 38987227 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 38987194 and 38987203.

It is not an unprimeable number, because it can be changed into a prime (38987213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 628796 + ... + 628857.

It is an arithmetic number, because the mean of its divisors is an integer number (10061232).

Almost surely, 2^38987243 is an apocalyptic number.

38987243 is a deficient number, since it is larger than the sum of its proper divisors (1257685).

38987243 is a wasteful number, since it uses less digits than its factorization.

38987243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1257684.

The product of its digits is 290304, while the sum is 44.

The square root of 38987243 is about 6243.9765374319. The cubic root of 38987243 is about 339.0841644704.

The spelling of 38987243 in words is "thirty-eight million, nine hundred eighty-seven thousand, two hundred forty-three".