38915989 has 8 divisors (see below), whose sum is σ = 45510080. Its totient is φ = 32580576.

The previous prime is 38915963. The next prime is 38915993. The reversal of 38915989 is 98951983.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 38915989 - 2⁷ = 38915861 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38915909) 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, 64344 + ... + 64945.

It is an arithmetic number, because the mean of its divisors is an integer number (5688760).

Almost surely, 2^38915989 is an apocalyptic number.

It is an amenable number.

38915989 is a deficient number, since it is larger than the sum of its proper divisors (6594091).

38915989 is a wasteful number, since it uses less digits than its factorization.

38915989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129339.

The product of its digits is 699840, while the sum is 52.

The square root of 38915989 is about 6238.2681090187. The cubic root of 38915989 is about 338.8774657720.

The spelling of 38915989 in words is "thirty-eight million, nine hundred fifteen thousand, nine hundred eighty-nine".