2780280564 has 48 divisors (see below), whose sum is σ = 6858969600. Its totient is φ = 874099296.

The previous prime is 2780280563. The next prime is 2780280611. The reversal of 2780280564 is 4650820872.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2780280563) 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, 24897 + ... + 78615.

It is an arithmetic number, because the mean of its divisors is an integer number (142895200).

Almost surely, 2^2780280564 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2780280564, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3429484800).

2780280564 is an abundant number, since it is smaller than the sum of its proper divisors (4078689036).

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

2780280564 is a wasteful number, since it uses less digits than its factorization.

2780280564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53972 (or 53970 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 42.

The square root of 2780280564 is about 52728.3658385124. The cubic root of 2780280564 is about 1406.1431684334.

The spelling of 2780280564 in words is "two billion, seven hundred eighty million, two hundred eighty thousand, five hundred sixty-four".