3897656 has 48 divisors (see below), whose sum is σ = 8693640. Its totient is φ = 1632960.

The previous prime is 3897653. The next prime is 3897659. The reversal of 3897656 is 6567983.

It is an interprime number because it is at equal distance from previous prime (3897653) and next prime (3897659).

It is a d-powerful number, because it can be written as 3³ + 8⁷ + 9² + 7⁶ + 6 + 5⁵ + 6⁸ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3897653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23831 + ... + 23993.

Almost surely, 2^3897656 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 3897656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4346820).

3897656 is an abundant number, since it is smaller than the sum of its proper divisors (4795984).

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

3897656 is a wasteful number, since it uses less digits than its factorization.

3897656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244 (or 233 counting only the distinct ones).

The product of its digits is 272160, while the sum is 44.

The square root of 3897656 is about 1974.2482113453. The cubic root of 3897656 is about 157.3745503109.

The spelling of 3897656 in words is "three million, eight hundred ninety-seven thousand, six hundred fifty-six".