3646887980 has 48 divisors (see below), whose sum is σ = 7872965856. Its totient is φ = 1417973760.

The previous prime is 3646887863. The next prime is 3646887983. The reversal of 3646887980 is 897886463.

3646887980 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (3646887983) 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, 1160972 + ... + 1164108.

It is an arithmetic number, because the mean of its divisors is an integer number (164020122).

Almost surely, 2^3646887980 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 3646887980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3936482928).

3646887980 is an abundant number, since it is smaller than the sum of its proper divisors (4226077876).

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

3646887980 is a wasteful number, since it uses less digits than its factorization.

3646887980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4754 (or 4752 counting only the distinct ones).

The product of its (nonzero) digits is 13934592, while the sum is 59.

The square root of 3646887980 is about 60389.4691150701. The cubic root of 3646887980 is about 1539.2440181119.

The spelling of 3646887980 in words is "three billion, six hundred forty-six million, eight hundred eighty-seven thousand, nine hundred eighty".