3261005628 has 48 divisors (see below), whose sum is σ = 7649782560. Its totient is φ = 1081195264.

The previous prime is 3261005623. The next prime is 3261005639. The reversal of 3261005628 is 8265001623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3261005621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2939938 + ... + 2941046.

It is an arithmetic number, because the mean of its divisors is an integer number (159370470).

Almost surely, 2^3261005628 is an apocalyptic number.

It is an amenable number.

3261005628 is an abundant number, since it is smaller than the sum of its proper divisors (4388776932).

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

3261005628 is a wasteful number, since it uses less digits than its factorization.

3261005628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2206 (or 2204 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 3261005628 is about 57105.2154185588. The cubic root of 3261005628 is about 1482.9181570650.

The spelling of 3261005628 in words is "three billion, two hundred sixty-one million, five thousand, six hundred twenty-eight".