38661904 has 10 divisors (see below), whose sum is σ = 74907470. Its totient is φ = 19330944.

The previous prime is 38661869. The next prime is 38661907. The reversal of 38661904 is 40916683.

38661904 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 20684304 + 17977600 = 4548^2 + 4240^2 .

It is not an unprimeable number, because it can be changed into a prime (38661907) 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 as a sum of consecutive naturals, namely, 1208169 + ... + 1208200.

It is an arithmetic number, because the mean of its divisors is an integer number (7490747).

Almost surely, 2^38661904 is an apocalyptic number.

It is an amenable number.

38661904 is a deficient number, since it is larger than the sum of its proper divisors (36245566).

38661904 is a wasteful number, since it uses less digits than its factorization.

38661904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2416377 (or 2416371 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 38661904 is about 6217.8697316686. The cubic root of 38661904 is about 338.1383372205.

The spelling of 38661904 in words is "thirty-eight million, six hundred sixty-one thousand, nine hundred four".