38911157 has 4 divisors (see below), whose sum is σ = 38928300. Its totient is φ = 38894016.

The previous prime is 38911139. The next prime is 38911189. The reversal of 38911157 is 75111983.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 30096196 + 8814961 = 5486^2 + 2969^2 .

It is a cyclic number.

It is not a de Polignac number, because 38911157 - 2¹² = 38907061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38911357) 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, 4532 + ... + 9917.

It is an arithmetic number, because the mean of its divisors is an integer number (9732075).

Almost surely, 2^38911157 is an apocalyptic number.

It is an amenable number.

38911157 is a deficient number, since it is larger than the sum of its proper divisors (17143).

38911157 is a wasteful number, since it uses less digits than its factorization.

38911157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17142.

The product of its digits is 7560, while the sum is 35.

The square root of 38911157 is about 6237.8808100187. The cubic root of 38911157 is about 338.8634396289.

The spelling of 38911157 in words is "thirty-eight million, nine hundred eleven thousand, one hundred fifty-seven".