38489618 has 4 divisors (see below), whose sum is σ = 57734430. Its totient is φ = 19244808.

The previous prime is 38489609. The next prime is 38489623. The reversal of 38489618 is 81698483.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81698483 = 809 ⋅100987.

It can be written as a sum of positive squares in only one way, i.e., 23843689 + 14645929 = 4883^2 + 3827^2 .

It is a Curzon number.

It is an unprimeable number.

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, 9622403 + ... + 9622406.

Almost surely, 2^38489618 is an apocalyptic number.

38489618 is a deficient number, since it is larger than the sum of its proper divisors (19244812).

38489618 is a wasteful number, since it uses less digits than its factorization.

38489618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19244811.

The product of its digits is 331776, while the sum is 47.

The square root of 38489618 is about 6204.0001611863. Note that the first 3 decimals coincide. The cubic root of 38489618 is about 337.6353162013.

The spelling of 38489618 in words is "thirty-eight million, four hundred eighty-nine thousand, six hundred eighteen".