38912609 has 8 divisors (see below), whose sum is σ = 41307048. Its totient is φ = 36529920.

The previous prime is 38912603. The next prime is 38912611. The reversal of 38912609 is 90621983.

It can be written as a sum of positive squares in 4 ways, for example, as 1763584 + 37149025 = 1328^2 + 6095^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 38912609 - 2⁴ = 38912593 is a prime.

It is a super-2 number, since 2×38912609² = 3028382278373762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38912603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4439 + ... + 9875.

It is an arithmetic number, because the mean of its divisors is an integer number (5163381).

Almost surely, 2^38912609 is an apocalyptic number.

It is an amenable number.

38912609 is a deficient number, since it is larger than the sum of its proper divisors (2394439).

38912609 is a wasteful number, since it uses less digits than its factorization.

38912609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5875.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 38912609 is about 6237.9971946130. The cubic root of 38912609 is about 338.8676545605.

The spelling of 38912609 in words is "thirty-eight million, nine hundred twelve thousand, six hundred nine".