38890809 has 12 divisors (see below), whose sum is σ = 56243200. Its totient is φ = 25896024.

The previous prime is 38890807. The next prime is 38890879. The reversal of 38890809 is 90809883.

38890809 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 38890809 - 2¹ = 38890807 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38890807) 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 11 ways as a sum of consecutive naturals, for example, 7272 + ... + 11430.

Almost surely, 2^38890809 is an apocalyptic number.

It is an amenable number.

38890809 is a deficient number, since it is larger than the sum of its proper divisors (17352391).

38890809 is a wasteful number, since it uses less digits than its factorization.

38890809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5204 (or 5201 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The square root of 38890809 is about 6236.2495941070. The cubic root of 38890809 is about 338.8043614959.

The spelling of 38890809 in words is "thirty-eight million, eight hundred ninety thousand, eight hundred nine".