38118821 has 8 divisors (see below), whose sum is σ = 41149920. Its totient is φ = 35101872.

The previous prime is 38118803. The next prime is 38118853. The reversal of 38118821 is 12881183.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 38118821 - 2¹⁰ = 38117797 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38118221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2450 + ... + 9068.

It is an arithmetic number, because the mean of its divisors is an integer number (5143740).

Almost surely, 2^38118821 is an apocalyptic number.

It is an amenable number.

38118821 is a deficient number, since it is larger than the sum of its proper divisors (3031099).

38118821 is a wasteful number, since it uses less digits than its factorization.

38118821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7075.

The product of its digits is 3072, while the sum is 32.

The square root of 38118821 is about 6174.0441365445. The cubic root of 38118821 is about 336.5475912367.

The spelling of 38118821 in words is "thirty-eight million, one hundred eighteen thousand, eight hundred twenty-one".