3561776 has 40 divisors (see below), whose sum is σ = 7332864. Its totient is φ = 1673280.

The previous prime is 3561773. The next prime is 3561799. The reversal of 3561776 is 6771653.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3561773) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21245 + ... + 21411.

Almost surely, 2^3561776 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 3561776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3666432).

3561776 is an abundant number, since it is smaller than the sum of its proper divisors (3771088).

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

3561776 is a wasteful number, since it uses less digits than its factorization.

3561776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249 (or 243 counting only the distinct ones).

The product of its digits is 26460, while the sum is 35.

The square root of 3561776 is about 1887.2668067870. The cubic root of 3561776 is about 152.7175217096.

It can be divided in two parts, 35 and 61776, that multiplied together give a triangular number (2162160 = T₂₀₇₉).

The spelling of 3561776 in words is "three million, five hundred sixty-one thousand, seven hundred seventy-six".