38840857 has 8 divisors (see below), whose sum is σ = 42468192. Its totient is φ = 35229600.

The previous prime is 38840833. The next prime is 38840917. The reversal of 38840857 is 75804883.

It is a happy number.

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 38840857 - 2⁷ = 38840729 is a prime.

It is a super-2 number, since 2×38840857² = 3017224344988898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38840357) 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, 1357 + ... + 8917.

It is an arithmetic number, because the mean of its divisors is an integer number (5308524).

Almost surely, 2^38840857 is an apocalyptic number.

It is an amenable number.

38840857 is a deficient number, since it is larger than the sum of its proper divisors (3627335).

38840857 is a wasteful number, since it uses less digits than its factorization.

38840857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8039.

The product of its (nonzero) digits is 215040, while the sum is 43.

The square root of 38840857 is about 6232.2433360709. The cubic root of 38840857 is about 338.6592440343.

The spelling of 38840857 in words is "thirty-eight million, eight hundred forty thousand, eight hundred fifty-seven".