38457218 has 4 divisors (see below), whose sum is σ = 57685830. Its totient is φ = 19228608.

The previous prime is 38457217. The next prime is 38457229. The reversal of 38457218 is 81275483.

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., 25331089 + 13126129 = 5033^2 + 3623^2 .

It is not an unprimeable number, because it can be changed into a prime (38457217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9614303 + ... + 9614306.

Almost surely, 2^38457218 is an apocalyptic number.

38457218 is a deficient number, since it is larger than the sum of its proper divisors (19228612).

38457218 is a wasteful number, since it uses less digits than its factorization.

38457218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19228611.

The product of its digits is 53760, while the sum is 38.

The square root of 38457218 is about 6201.3883929327. The cubic root of 38457218 is about 337.5405507746.

It can be divided in two parts, 384572 and 18, that multiplied together give a palindrome (6922296).

The spelling of 38457218 in words is "thirty-eight million, four hundred fifty-seven thousand, two hundred eighteen".