38081816 has 8 divisors (see below), whose sum is σ = 71403420. Its totient is φ = 19040904.

The previous prime is 38081809. The next prime is 38081821. The reversal of 38081816 is 61818083.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2380106 + ... + 2380121.

Almost surely, 2^38081816 is an apocalyptic number.

It is an amenable number.

38081816 is a deficient number, since it is larger than the sum of its proper divisors (33321604).

38081816 is a wasteful number, since it uses less digits than its factorization.

38081816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4760233 (or 4760229 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 35.

The square root of 38081816 is about 6171.0465887076. The cubic root of 38081816 is about 336.4386513878.

Adding to 38081816 its reverse (61818083), we get a palindrome (99899899).

The spelling of 38081816 in words is "thirty-eight million, eighty-one thousand, eight hundred sixteen".