38500809 has 4 divisors (see below), whose sum is σ = 51334416. Its totient is φ = 25667204.

The previous prime is 38500807. The next prime is 38500823. The reversal of 38500809 is 90800583.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90800583 = 3 ⋅30266861.

It is a cyclic number.

It is not a de Polignac number, because 38500809 - 2¹ = 38500807 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 38500809.

It is not an unprimeable number, because it can be changed into a prime (38500807) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6416799 + ... + 6416804.

It is an arithmetic number, because the mean of its divisors is an integer number (12833604).

Almost surely, 2^38500809 is an apocalyptic number.

It is an amenable number.

38500809 is a deficient number, since it is larger than the sum of its proper divisors (12833607).

38500809 is a wasteful number, since it uses less digits than its factorization.

38500809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12833606.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 38500809 is about 6204.9020137308. The cubic root of 38500809 is about 337.6680359396.

The spelling of 38500809 in words is "thirty-eight million, five hundred thousand, eight hundred nine".