38243818 has 4 divisors (see below), whose sum is σ = 57365730. Its totient is φ = 19121908.

The previous prime is 38243783. The next prime is 38243851. The reversal of 38243818 is 81834283.

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

It can be written as a sum of positive squares in only one way, i.e., 24870169 + 13373649 = 4987^2 + 3657^2 .

It is a plaindrome in base 15.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9560953 + ... + 9560956.

Almost surely, 2^38243818 is an apocalyptic number.

38243818 is a deficient number, since it is larger than the sum of its proper divisors (19121912).

38243818 is a wasteful number, since it uses less digits than its factorization.

38243818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19121911.

The product of its digits is 36864, while the sum is 37.

The square root of 38243818 is about 6184.1586331529. The cubic root of 38243818 is about 336.9150522446.

The spelling of 38243818 in words is "thirty-eight million, two hundred forty-three thousand, eight hundred eighteen".