2170978560 has 216 divisors, whose sum is σ = 7557076800. Its totient is φ = 575410176.

The previous prime is 2170978559. The next prime is 2170978571. The reversal of 2170978560 is 658790712.

2170978560 is a `hidden beast` number, since 2 + 17 + 0 + 9 + 78 + 560 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2292007 + ... + 2292953.

Almost surely, 2^2170978560 is an apocalyptic number.

2170978560 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 2170978560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3778538400).

2170978560 is an abundant number, since it is smaller than the sum of its proper divisors (5386098240).

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

2170978560 is a wasteful number, since it uses less digits than its factorization.

2170978560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1173 (or 1156 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 45.

The square root of 2170978560 is about 46593.7609557331. The cubic root of 2170978560 is about 1294.8471686985.

The spelling of 2170978560 in words is "two billion, one hundred seventy million, nine hundred seventy-eight thousand, five hundred sixty".