38901181 has 4 divisors (see below), whose sum is σ = 42437664. Its totient is φ = 35364700.

The previous prime is 38901157. The next prime is 38901193. The reversal of 38901181 is 18110983.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 38901181 - 2⁷ = 38901053 is a prime.

It is a super-2 number, since 2×38901181² = 3026603766389522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38901131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1768225 + ... + 1768246.

It is an arithmetic number, because the mean of its divisors is an integer number (10609416).

Almost surely, 2^38901181 is an apocalyptic number.

It is an amenable number.

38901181 is a deficient number, since it is larger than the sum of its proper divisors (3536483).

38901181 is a wasteful number, since it uses less digits than its factorization.

38901181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3536482.

The product of its (nonzero) digits is 1728, while the sum is 31.

The square root of 38901181 is about 6237.0811282202. The cubic root of 38901181 is about 338.8344780073.

It can be divided in two parts, 389011 and 81, that multiplied together give a triangular number (31509891 = T₇₉₃₈).

The spelling of 38901181 in words is "thirty-eight million, nine hundred one thousand, one hundred eighty-one".