3897216 has 96 divisors (see below), whose sum is σ = 11934000. Its totient is φ = 1216512.

The previous prime is 3897209. The next prime is 3897217. The reversal of 3897216 is 6127983.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3897217) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19485 + ... + 19683.

Almost surely, 2^3897216 is an apocalyptic number.

3897216 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3897216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5967000).

3897216 is an abundant number, since it is smaller than the sum of its proper divisors (8036784).

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

3897216 is a wasteful number, since it uses less digits than its factorization.

3897216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236 (or 221 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 3897216 is about 1974.1367733772. The cubic root of 3897216 is about 157.3686281696.

The spelling of 3897216 in words is "three million, eight hundred ninety-seven thousand, two hundred sixteen".