38218403 has 2 divisors, whose sum is σ = 38218404. Its totient is φ = 38218402.

The previous prime is 38218399. The next prime is 38218417. The reversal of 38218403 is 30481283.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 38218403 - 2² = 38218399 is a prime.

It is a Sophie Germain prime.

It is equal to p_2331569 and since 38218403 and 2331569 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (38218423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19109201 + 19109202.

It is an arithmetic number, because the mean of its divisors is an integer number (19109202).

Almost surely, 2^38218403 is an apocalyptic number.

38218403 is a deficient number, since it is larger than the sum of its proper divisors (1).

38218403 is an equidigital number, since it uses as much as digits as its factorization.

38218403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 38218403 is about 6182.1034446214. The cubic root of 38218403 is about 336.8404031991.

Adding to 38218403 its reverse (30481283), we get a palindrome (68699686).

The spelling of 38218403 in words is "thirty-eight million, two hundred eighteen thousand, four hundred three".