38042781 has 8 divisors (see below), whose sum is σ = 57969984. Its totient is φ = 21738720.

The previous prime is 38042749. The next prime is 38042791. The reversal of 38042781 is 18724083.

38042781 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 not a de Polignac number, because 38042781 - 2⁵ = 38042749 is a prime.

It is a super-2 number, since 2×38042781² = 2894506372427922, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38042701) 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, 905760 + ... + 905801.

It is an arithmetic number, because the mean of its divisors is an integer number (7246248).

Almost surely, 2^38042781 is an apocalyptic number.

It is an amenable number.

38042781 is a deficient number, since it is larger than the sum of its proper divisors (19927203).

38042781 is a wasteful number, since it uses less digits than its factorization.

38042781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1811571.

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 38042781 is about 6167.8830241826. The cubic root of 38042781 is about 336.3236588630.

The spelling of 38042781 in words is "thirty-eight million, forty-two thousand, seven hundred eighty-one".