2169434880 has 144 divisors (see below), whose sum is σ = 7698603360. Its totient is φ = 578506752.

The previous prime is 2169434843. The next prime is 2169434881. The reversal of 2169434880 is 884349612.

It is a happy number.

2169434880 is a `hidden beast` number, since 2 + 169 + 4 + 3 + 488 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-2 number, since 2×2169434880² = 9412895397121228800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (2169434881) 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, 3174 + ... + 65946.

Almost surely, 2^2169434880 is an apocalyptic number.

2169434880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2169434880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3849301680).

2169434880 is an abundant number, since it is smaller than the sum of its proper divisors (5529168480).

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

2169434880 is an equidigital number, since it uses as much as digits as its factorization.

2169434880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62803 (or 62783 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The square root of 2169434880 is about 46577.1927020081. The cubic root of 2169434880 is about 1294.5401944368.

The spelling of 2169434880 in words is "two billion, one hundred sixty-nine million, four hundred thirty-four thousand, eight hundred eighty".