38729409 has 8 divisors (see below), whose sum is σ = 51690912. Its totient is φ = 25793760.

The previous prime is 38729407. The next prime is 38729441. The reversal of 38729409 is 90492783.

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

It is not a de Polignac number, because 38729409 - 2¹ = 38729407 is a prime.

It is not an unprimeable number, because it can be changed into a prime (38729407) 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, 2644 + ... + 9189.

It is an arithmetic number, because the mean of its divisors is an integer number (6461364).

Almost surely, 2^38729409 is an apocalyptic number.

It is an amenable number.

38729409 is a deficient number, since it is larger than the sum of its proper divisors (12961503).

38729409 is a wasteful number, since it uses less digits than its factorization.

38729409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12927.

The product of its (nonzero) digits is 108864, while the sum is 42.

The square root of 38729409 is about 6223.2956703020. The cubic root of 38729409 is about 338.3350231391.

The spelling of 38729409 in words is "thirty-eight million, seven hundred twenty-nine thousand, four hundred nine".