3857407 has 4 divisors (see below), whose sum is σ = 3862240. Its totient is φ = 3852576.

The previous prime is 3857383. The next prime is 3857417. The reversal of 3857407 is 7047583.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 7047583 = 383 ⋅18401.

It is a cyclic number.

It is not a de Polignac number, because 3857407 - 2¹¹ = 3855359 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 (3857417) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 903 + ... + 2920.

It is an arithmetic number, because the mean of its divisors is an integer number (965560).

Almost surely, 2^3857407 is an apocalyptic number.

3857407 is a deficient number, since it is larger than the sum of its proper divisors (4833).

3857407 is a wasteful number, since it uses less digits than its factorization.

3857407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4832.

The product of its (nonzero) digits is 23520, while the sum is 34.

The square root of 3857407 is about 1964.0282584525. The cubic root of 3857407 is about 156.8309674146.

The spelling of 3857407 in words is "three million, eight hundred fifty-seven thousand, four hundred seven".