38691957 has 8 divisors (see below), whose sum is σ = 53832384. Its totient is φ = 24673088.

The previous prime is 38691953. The next prime is 38691967. The reversal of 38691957 is 75919683.

38691957 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 38691957 - 2² = 38691953 is a prime.

It is a super-3 number, since 3×38691957³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38691953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 280308 + ... + 280445.

It is an arithmetic number, because the mean of its divisors is an integer number (6729048).

Almost surely, 2^38691957 is an apocalyptic number.

It is an amenable number.

38691957 is a deficient number, since it is larger than the sum of its proper divisors (15140427).

38691957 is a wasteful number, since it uses less digits than its factorization.

38691957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560779.

The product of its digits is 408240, while the sum is 48.

The square root of 38691957 is about 6220.2859259040. The cubic root of 38691957 is about 338.2259293844.

The spelling of 38691957 in words is "thirty-eight million, six hundred ninety-one thousand, nine hundred fifty-seven".