3261861880 has 32 divisors (see below), whose sum is σ = 7340945040. Its totient is φ = 1304432640.

The previous prime is 3261861877. The next prime is 3261861923. The reversal of 3261861880 is 881681623.

3261861880 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 235960 + ... + 249400.

Almost surely, 2^3261861880 is an apocalyptic number.

It is an amenable number.

3261861880 is an abundant number, since it is smaller than the sum of its proper divisors (4079083160).

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

3261861880 is a wasteful number, since it uses less digits than its factorization.

3261861880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19519 (or 19515 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 43.

The square root of 3261861880 is about 57112.7120700812. The cubic root of 3261861880 is about 1483.0479371252.

The spelling of 3261861880 in words is "three billion, two hundred sixty-one million, eight hundred sixty-one thousand, eight hundred eighty".