38493909 has 24 divisors (see below), whose sum is σ = 57717504. Its totient is φ = 24696000.

The previous prime is 38493907. The next prime is 38493929. The reversal of 38493909 is 90939483.

It is not a de Polignac number, because 38493909 - 2¹ = 38493907 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38493907) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 78154 + ... + 78644.

It is an arithmetic number, because the mean of its divisors is an integer number (2404896).

Almost surely, 2^38493909 is an apocalyptic number.

It is an amenable number.

38493909 is a deficient number, since it is larger than the sum of its proper divisors (19223595).

38493909 is a wasteful number, since it uses less digits than its factorization.

38493909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 809 (or 806 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 45.

The square root of 38493909 is about 6204.3459768133. The cubic root of 38493909 is about 337.6478627821.

The spelling of 38493909 in words is "thirty-eight million, four hundred ninety-three thousand, nine hundred nine".