38971930 has 32 divisors (see below), whose sum is σ = 72140544. Its totient is φ = 15151296.

The previous prime is 38971921. The next prime is 38971931. The reversal of 38971930 is 3917983.

It is a super-2 number, since 2×38971930² = 3037622655849800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (38971931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132864 + ... + 133156.

It is an arithmetic number, because the mean of its divisors is an integer number (2254392).

Almost surely, 2^38971930 is an apocalyptic number.

38971930 is a deficient number, since it is larger than the sum of its proper divisors (33168614).

38971930 is a wasteful number, since it uses less digits than its factorization.

38971930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 630.

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 38971930 is about 6242.7501952265. The cubic root of 38971930 is about 339.0397646842.

The spelling of 38971930 in words is "thirty-eight million, nine hundred seventy-one thousand, nine hundred thirty".