2978782560 has 768 divisors, whose sum is σ = 12192768000. Its totient is φ = 673505280.

The previous prime is 2978782537. The next prime is 2978782607. The reversal of 2978782560 is 652878792.

It is a happy number.

2978782560 is a `hidden beast` number, since 2 + 9 + 7 + 8 + 78 + 2 + 560 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 2978782497 and 2978782506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 50487811 + ... + 50487869.

It is an arithmetic number, because the mean of its divisors is an integer number (15876000).

Almost surely, 2^2978782560 is an apocalyptic number.

2978782560 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 2978782560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6096384000).

2978782560 is an abundant number, since it is smaller than the sum of its proper divisors (9213985440).

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

2978782560 is a wasteful number, since it uses less digits than its factorization.

2978782560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156 (or 142 counting only the distinct ones).

The product of its (nonzero) digits is 3386880, while the sum is 54.

The square root of 2978782560 is about 54578.2242290824. The cubic root of 2978782560 is about 1438.8414292179.

The spelling of 2978782560 in words is "two billion, nine hundred seventy-eight million, seven hundred eighty-two thousand, five hundred sixty".