3897816 has 72 divisors (see below), whose sum is σ = 10903140. Its totient is φ = 1160640.

The previous prime is 3897799. The next prime is 3897823. The reversal of 3897816 is 6187983.

It is a nialpdrome in base 13.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 125721 + ... + 125751.

Almost surely, 2^3897816 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3897816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5451570).

3897816 is an abundant number, since it is smaller than the sum of its proper divisors (7005324).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3897816 is a wasteful number, since it uses less digits than its factorization.

3897816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97 (or 49 counting only the distinct ones).

The product of its digits is 72576, while the sum is 42.

The square root of 3897816 is about 1974.2887326832. The cubic root of 3897816 is about 157.3767037063.

The spelling of 3897816 in words is "three million, eight hundred ninety-seven thousand, eight hundred sixteen".