2189897760 has 48 divisors (see below), whose sum is σ = 6898179456. Its totient is φ = 583972608.

The previous prime is 2189897741. The next prime is 2189897761. The reversal of 2189897760 is 677989812.

It is a tau number, because it is divible by the number of its divisors (48).

It is a self number, because there is not a number n which added to its sum of digits gives 2189897760.

It is not an unprimeable number, because it can be changed into a prime (2189897761) 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, 2280664 + ... + 2281623.

It is an arithmetic number, because the mean of its divisors is an integer number (143712072).

Almost surely, 2^2189897760 is an apocalyptic number.

2189897760 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2189897760 is an abundant number, since it is smaller than the sum of its proper divisors (4708281696).

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

2189897760 is a wasteful number, since it uses less digits than its factorization.

2189897760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4562305 (or 4562297 counting only the distinct ones).

The product of its (nonzero) digits is 3048192, while the sum is 57.

The square root of 2189897760 is about 46796.3434468976. The cubic root of 2189897760 is about 1298.5976514972.

The spelling of 2189897760 in words is "two billion, one hundred eighty-nine million, eight hundred ninety-seven thousand, seven hundred sixty".