38809815 has 16 divisors (see below), whose sum is σ = 67741056. Its totient is φ = 18816800.

The previous prime is 38809789. The next prime is 38809831. The reversal of 38809815 is 51890883.

It is not a de Polignac number, because 38809815 - 2⁶ = 38809751 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 117441 + ... + 117770.

It is an arithmetic number, because the mean of its divisors is an integer number (4233816).

Almost surely, 2^38809815 is an apocalyptic number.

38809815 is a deficient number, since it is larger than the sum of its proper divisors (28931241).

38809815 is a wasteful number, since it uses less digits than its factorization.

38809815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235230.

The product of its (nonzero) digits is 69120, while the sum is 42.

The square root of 38809815 is about 6229.7524027846. The cubic root of 38809815 is about 338.5690000411.

It can be divided in two parts, 3880 and 9815, that added together give a triangular number (13695 = T₁₆₅).

The spelling of 38809815 in words is "thirty-eight million, eight hundred nine thousand, eight hundred fifteen".