38725781 has 8 divisors (see below), whose sum is σ = 40867200. Its totient is φ = 36594720.

The previous prime is 38725763. The next prime is 38725787. The reversal of 38725781 is 18752783.

38725781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 38725781 - 2²² = 34531477 is a prime.

It is a super-2 number, since 2×38725781² = 2999372228119922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38725787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5825 + ... + 10553.

It is an arithmetic number, because the mean of its divisors is an integer number (5108400).

Almost surely, 2^38725781 is an apocalyptic number.

It is an amenable number.

38725781 is a deficient number, since it is larger than the sum of its proper divisors (2141419).

38725781 is a wasteful number, since it uses less digits than its factorization.

38725781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5179.

The product of its digits is 94080, while the sum is 41.

The square root of 38725781 is about 6223.0041780478. The cubic root of 38725781 is about 338.3244582323.

The spelling of 38725781 in words is "thirty-eight million, seven hundred twenty-five thousand, seven hundred eighty-one".