38725791 has 32 divisors (see below), whose sum is σ = 58426368. Its totient is φ = 22654080.

The previous prime is 38725787. The next prime is 38725793. The reversal of 38725791 is 19752783.

38725791 = 1005² + 1006² + ... + 1041².

It is not a de Polignac number, because 38725791 - 2² = 38725787 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38725793) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 67536 + ... + 68106.

It is an arithmetic number, because the mean of its divisors is an integer number (1825824).

Almost surely, 2^38725791 is an apocalyptic number.

38725791 is a deficient number, since it is larger than the sum of its proper divisors (19700577).

38725791 is a wasteful number, since it uses less digits than its factorization.

38725791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 671.

The product of its digits is 105840, while the sum is 42.

The square root of 38725791 is about 6223.0049815182. The cubic root of 38725791 is about 338.3244873537.

The spelling of 38725791 in words is "thirty-eight million, seven hundred twenty-five thousand, seven hundred ninety-one".