38474809 has 4 divisors (see below), whose sum is σ = 39369616. Its totient is φ = 37580004.

The previous prime is 38474773. The next prime is 38474819. The reversal of 38474809 is 90847483.

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: 90847483 = 61 ⋅1489303.

It is a cyclic number.

It is not a de Polignac number, because 38474809 - 2²³ = 30086201 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43), and also a Moran number because the ratio is a prime number: 894763 = 38474809 / (3 + 8 + 4 + 7 + 4 + 8 + 0 + 9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38474819) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 447339 + ... + 447424.

It is an arithmetic number, because the mean of its divisors is an integer number (9842404).

Almost surely, 2^38474809 is an apocalyptic number.

It is an amenable number.

38474809 is a deficient number, since it is larger than the sum of its proper divisors (894807).

38474809 is an equidigital number, since it uses as much as digits as its factorization.

38474809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 894806.

The product of its (nonzero) digits is 193536, while the sum is 43.

The square root of 38474809 is about 6202.8065422033. The cubic root of 38474809 is about 337.5920085679.

The spelling of 38474809 in words is "thirty-eight million, four hundred seventy-four thousand, eight hundred nine".