38971906 has 8 divisors (see below), whose sum is σ = 58624524. Its totient is φ = 19430400.

The previous prime is 38971901. The next prime is 38971909. The reversal of 38971906 is 60917983.

It can be written as a sum of positive squares in 2 ways, for example, as 34327881 + 4644025 = 5859^2 + 2155^2 .

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

It is not an unprimeable number, because it can be changed into a prime (38971901) 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, 26895 + ... + 28306.

Almost surely, 2^38971906 is an apocalyptic number.

38971906 is a deficient number, since it is larger than the sum of its proper divisors (19652618).

38971906 is a wasteful number, since it uses less digits than its factorization.

38971906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55556.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 38971906 is about 6242.7482729964. The cubic root of 38971906 is about 339.0396950875.

The spelling of 38971906 in words is "thirty-eight million, nine hundred seventy-one thousand, nine hundred six".