38540397 has 8 divisors (see below), whose sum is σ = 58728256. Its totient is φ = 22023072.

The previous prime is 38540389. The next prime is 38540413. The reversal of 38540397 is 79304583.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 38540397 - 2³ = 38540389 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 (38540317) 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 in 7 ways as a sum of consecutive naturals, for example, 917608 + ... + 917649.

It is an arithmetic number, because the mean of its divisors is an integer number (7341032).

Almost surely, 2^38540397 is an apocalyptic number.

It is an amenable number.

38540397 is a deficient number, since it is larger than the sum of its proper divisors (20187859).

38540397 is a wasteful number, since it uses less digits than its factorization.

38540397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1835267.

The product of its (nonzero) digits is 90720, while the sum is 39.

The square root of 38540397 is about 6208.0912525510. The cubic root of 38540397 is about 337.7837306784.

The spelling of 38540397 in words is "thirty-eight million, five hundred forty thousand, three hundred ninety-seven".