38922409 has 4 divisors (see below), whose sum is σ = 39974404. Its totient is φ = 37870416.

The previous prime is 38922397. The next prime is 38922419. The reversal of 38922409 is 90422983.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 26163225 + 12759184 = 5115^2 + 3572^2 .

It is a cyclic number.

It is not a de Polignac number, because 38922409 - 2²⁵ = 5367977 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 1051957 = 38922409 / (3 + 8 + 9 + 2 + 2 + 4 + 0 + 9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38922419) 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, 525942 + ... + 526015.

It is an arithmetic number, because the mean of its divisors is an integer number (9993601).

Almost surely, 2^38922409 is an apocalyptic number.

It is an amenable number.

38922409 is a deficient number, since it is larger than the sum of its proper divisors (1051995).

38922409 is a wasteful number, since it uses less digits than its factorization.

38922409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1051994.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 38922409 is about 6238.7826536913. The cubic root of 38922409 is about 338.8960997042.

The spelling of 38922409 in words is "thirty-eight million, nine hundred twenty-two thousand, four hundred nine".