38461809 has 4 divisors (see below), whose sum is σ = 51282416. Its totient is φ = 25641204.

The previous prime is 38461807. The next prime is 38461811. The reversal of 38461809 is 90816483.

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: 90816483 = 3 ⋅30272161.

It is an interprime number because it is at equal distance from previous prime (38461807) and next prime (38461811).

It is not a de Polignac number, because 38461809 - 2¹ = 38461807 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38461807) 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, 6410299 + ... + 6410304.

It is an arithmetic number, because the mean of its divisors is an integer number (12820604).

Almost surely, 2^38461809 is an apocalyptic number.

It is an amenable number.

38461809 is a deficient number, since it is larger than the sum of its proper divisors (12820607).

38461809 is a wasteful number, since it uses less digits than its factorization.

38461809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12820606.

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 38461809 is about 6201.7585409301. The cubic root of 38461809 is about 337.5539820374.

The spelling of 38461809 in words is "thirty-eight million, four hundred sixty-one thousand, eight hundred nine".