2189648780 has 24 divisors (see below), whose sum is σ = 5016286800. Its totient is φ = 796235840.

The previous prime is 2189648777. The next prime is 2189648809. The reversal of 2189648780 is 878469812.

It is a happy 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, 4976255 + ... + 4976694.

It is an arithmetic number, because the mean of its divisors is an integer number (209011950).

Almost surely, 2^2189648780 is an apocalyptic number.

2189648780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2189648780 is an abundant number, since it is smaller than the sum of its proper divisors (2826638020).

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

2189648780 is a wasteful number, since it uses less digits than its factorization.

2189648780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9952969 (or 9952967 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 53.

The square root of 2189648780 is about 46793.6831206948. The cubic root of 2189648780 is about 1298.5484350294.

The spelling of 2189648780 in words is "two billion, one hundred eighty-nine million, six hundred forty-eight thousand, seven hundred eighty".