38971905 has 48 divisors (see below), whose sum is σ = 76826880. Its totient is φ = 16762368.

The previous prime is 38971901. The next prime is 38971909. The reversal of 38971905 is 50917983.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (38971901) and next prime (38971909).

It is not a de Polignac number, because 38971905 - 2² = 38971901 is a prime.

It is a congruent number.

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 47 ways as a sum of consecutive naturals, for example, 10936 + ... + 14054.

It is an arithmetic number, because the mean of its divisors is an integer number (1600560).

Almost surely, 2^38971905 is an apocalyptic number.

38971905 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

38971905 is a deficient number, since it is larger than the sum of its proper divisors (37854975).

38971905 is a wasteful number, since it uses less digits than its factorization.

38971905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3158 (or 3151 counting only the distinct ones).

The product of its (nonzero) digits is 68040, while the sum is 42.

The square root of 38971905 is about 6242.7481929035. The cubic root of 38971905 is about 339.0396921876.

The spelling of 38971905 in words is "thirty-eight million, nine hundred seventy-one thousand, nine hundred five".