3857657 has 8 divisors (see below), whose sum is σ = 4195656. Its totient is φ = 3532032.

The previous prime is 3857641. The next prime is 3857663. The reversal of 3857657 is 7567583.

It can be written as a sum of positive squares in 4 ways, for example, as 2972176 + 885481 = 1724^2 + 941^2 .

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 3857657 - 2⁴ = 3857641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3850657) 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, 2438 + ... + 3695.

It is an arithmetic number, because the mean of its divisors is an integer number (524457).

Almost surely, 2^3857657 is an apocalyptic number.

3857657 is a gapful number since it is divisible by the number (37) formed by its first and last digit.

It is an amenable number.

3857657 is a deficient number, since it is larger than the sum of its proper divisors (337999).

3857657 is a wasteful number, since it uses less digits than its factorization.

3857657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6187.

The product of its digits is 176400, while the sum is 41.

The square root of 3857657 is about 1964.0919021268. The cubic root of 3857657 is about 156.8343554328.

The spelling of 3857657 in words is "three million, eight hundred fifty-seven thousand, six hundred fifty-seven".