38621805 has 16 divisors (see below), whose sum is σ = 61876224. Its totient is φ = 20571200.

The previous prime is 38621801. The next prime is 38621819. The reversal of 38621805 is 50812683.

It is a happy number.

38621805 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 38621805 - 2² = 38621801 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38621801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16147 + ... + 18383.

It is an arithmetic number, because the mean of its divisors is an integer number (3867264).

Almost surely, 2^38621805 is an apocalyptic number.

It is an amenable number.

38621805 is a deficient number, since it is larger than the sum of its proper divisors (23254419).

38621805 is a wasteful number, since it uses less digits than its factorization.

38621805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3396.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 38621805 is about 6214.6443985155. The cubic root of 38621805 is about 338.0213943719.

The spelling of 38621805 in words is "thirty-eight million, six hundred twenty-one thousand, eight hundred five".