38781603 has 48 divisors (see below), whose sum is σ = 68140800. Its totient is φ = 20761920.

The previous prime is 38781601. The next prime is 38781643. The reversal of 38781603 is 30618783.

38781603 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 38781603 - 2¹ = 38781601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (38781601) 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 47 ways as a sum of consecutive naturals, for example, 214173 + ... + 214353.

It is an arithmetic number, because the mean of its divisors is an integer number (1419600).

Almost surely, 2^38781603 is an apocalyptic number.

38781603 is a deficient number, since it is larger than the sum of its proper divisors (29359197).

38781603 is a wasteful number, since it uses less digits than its factorization.

38781603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392 (or 389 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 38781603 is about 6227.4876956924. The cubic root of 38781603 is about 338.4869415546.

Subtracting from 38781603 its reverse (30618783), we obtain a triangular number (8162820 = T₄₀₄₀).

The spelling of 38781603 in words is "thirty-eight million, seven hundred eighty-one thousand, six hundred three".