2780258328 has 96 divisors (see below), whose sum is σ = 7705095840. Its totient is φ = 905425920.

The previous prime is 2780258317. The next prime is 2780258347. The reversal of 2780258328 is 8238520872.

2780258328 is a `hidden beast` number, since 2 + 78 + 0 + 258 + 328 = 666.

It is a congruent number.

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, 575250 + ... + 580062.

It is an arithmetic number, because the mean of its divisors is an integer number (80261415).

Almost surely, 2^2780258328 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 2780258328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3852547920).

2780258328 is an abundant number, since it is smaller than the sum of its proper divisors (4924837512).

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

2780258328 is a wasteful number, since it uses less digits than its factorization.

2780258328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5009 (or 5002 counting only the distinct ones).

The product of its (nonzero) digits is 430080, while the sum is 45.

The square root of 2780258328 is about 52728.1549838414. The cubic root of 2780258328 is about 1406.1394197611.

The spelling of 2780258328 in words is "two billion, seven hundred eighty million, two hundred fifty-eight thousand, three hundred twenty-eight".