38490157 has 2 divisors, whose sum is σ = 38490158. Its totient is φ = 38490156.

The previous prime is 38490149. The next prime is 38490161. The reversal of 38490157 is 75109483.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35271721 + 3218436 = 5939^2 + 1794^2 .

It is a cyclic number.

It is not a de Polignac number, because 38490157 - 2³ = 38490149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38490107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19245078 + 19245079.

It is an arithmetic number, because the mean of its divisors is an integer number (19245079).

Almost surely, 2^38490157 is an apocalyptic number.

It is an amenable number.

38490157 is a deficient number, since it is larger than the sum of its proper divisors (1).

38490157 is an equidigital number, since it uses as much as digits as its factorization.

38490157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 38490157 is about 6204.0436007494. The cubic root of 38490157 is about 337.6368922504.

The spelling of 38490157 in words is "thirty-eight million, four hundred ninety thousand, one hundred fifty-seven".