38691357 has 8 divisors (see below), whose sum is σ = 52788384. Its totient is φ = 25194288.

The previous prime is 38691349. The next prime is 38691407. The reversal of 38691357 is 75319683.

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

It is not a de Polignac number, because 38691357 - 2³ = 38691349 is a prime.

It is a super-2 number, since 2×38691357² = 2994042213002898, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38691347) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 149838 + ... + 150095.

It is an arithmetic number, because the mean of its divisors is an integer number (6598548).

Almost surely, 2^38691357 is an apocalyptic number.

It is an amenable number.

38691357 is a deficient number, since it is larger than the sum of its proper divisors (14097027).

38691357 is a wasteful number, since it uses less digits than its factorization.

38691357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299979.

The product of its digits is 136080, while the sum is 42.

The square root of 38691357 is about 6220.2376964229. The cubic root of 38691357 is about 338.2241810744.

The spelling of 38691357 in words is "thirty-eight million, six hundred ninety-one thousand, three hundred fifty-seven".