38261931 has 16 divisors (see below), whose sum is σ = 51863328. Its totient is φ = 25088000.

The previous prime is 38261911. The next prime is 38261939. The reversal of 38261931 is 13916283.

It is a 12-Lehmer number, since φ(38261931) divides (38261931-1)¹².

It is a cyclic number.

It is not a de Polignac number, because 38261931 - 2¹³ = 38253739 is a prime.

It is a super-2 number, since 2×38261931² = 2927950727697522, 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 junction number, because it is equal to n+sod(n) for n = 38261892 and 38261901.

It is not an unprimeable number, because it can be changed into a prime (38261939) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59371 + ... + 60011.

It is an arithmetic number, because the mean of its divisors is an integer number (3241458).

Almost surely, 2^38261931 is an apocalyptic number.

38261931 is a deficient number, since it is larger than the sum of its proper divisors (13601397).

38261931 is a wasteful number, since it uses less digits than its factorization.

38261931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 942.

The product of its digits is 7776, while the sum is 33.

The square root of 38261931 is about 6185.6229274019. The cubic root of 38261931 is about 336.9682336431.

The spelling of 38261931 in words is "thirty-eight million, two hundred sixty-one thousand, nine hundred thirty-one".