38611809 has 20 divisors (see below), whose sum is σ = 57925120. Its totient is φ = 25631640.

The previous prime is 38611787. The next prime is 38611813. The reversal of 38611809 is 90811683.

38611809 is a `hidden beast` number, since 38 + 611 + 8 + 0 + 9 = 666.

It is not a de Polignac number, because 38611809 - 2⁷ = 38611681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38611829) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 21072 + ... + 22830.

It is an arithmetic number, because the mean of its divisors is an integer number (2896256).

Almost surely, 2^38611809 is an apocalyptic number.

It is an amenable number.

38611809 is a deficient number, since it is larger than the sum of its proper divisors (19313311).

38611809 is a wasteful number, since it uses less digits than its factorization.

38611809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2042 (or 2033 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 38611809 is about 6213.8401170291. The cubic root of 38611809 is about 337.9922299020.

The spelling of 38611809 in words is "thirty-eight million, six hundred eleven thousand, eight hundred nine".