3897645 has 16 divisors (see below), whose sum is σ = 6272640. Its totient is φ = 2066624.

The previous prime is 3897637. The next prime is 3897653. The reversal of 3897645 is 5467983.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (3897637) and next prime (3897653).

It is a cyclic number.

It is not a de Polignac number, because 3897645 - 2³ = 3897637 is a prime.

It is a super-3 number, since 3×3897645³ (a number of 21 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3897597 and 3897606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2296 + ... + 3614.

It is an arithmetic number, because the mean of its divisors is an integer number (392040).

Almost surely, 2^3897645 is an apocalyptic number.

It is an amenable number.

3897645 is a deficient number, since it is larger than the sum of its proper divisors (2374995).

3897645 is a wasteful number, since it uses less digits than its factorization.

3897645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1524.

The product of its digits is 181440, while the sum is 42.

The square root of 3897645 is about 1974.2454254727. The cubic root of 3897645 is about 157.3744022628.

The spelling of 3897645 in words is "three million, eight hundred ninety-seven thousand, six hundred forty-five".