3891776 has 84 divisors (see below), whose sum is σ = 9642348. Its totient is φ = 1548288.

The previous prime is 3891773. The next prime is 3891779. The reversal of 3891776 is 6771983.

It is an interprime number because it is at equal distance from previous prime (3891773) and next prime (3891779).

It can be written as a sum of positive squares in 2 ways, for example, as 2637376 + 1254400 = 1624^2 + 1120^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3891773) 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, 53276 + ... + 53348.

Almost surely, 2^3891776 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 3891776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4821174).

3891776 is an abundant number, since it is smaller than the sum of its proper divisors (5750572).

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

3891776 is a wasteful number, since it uses less digits than its factorization.

3891776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116 (or 99 counting only the distinct ones).

The product of its digits is 63504, while the sum is 41.

The square root of 3891776 is about 1972.7584748266. The cubic root of 3891776 is about 157.2953721176.

The spelling of 3891776 in words is "three million, eight hundred ninety-one thousand, seven hundred seventy-six".