2538905780 has 54 divisors (see below), whose sum is σ = 5636592486. Its totient is φ = 960489216.

The previous prime is 2538905777. The next prime is 2538905791. The reversal of 2538905780 is 875098352.

It can be written as a sum of positive squares in 3 ways, for example, as 456078736 + 2082827044 = 21356^2 + 45638^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 4281164 + ... + 4281756.

Almost surely, 2^2538905780 is an apocalyptic number.

2538905780 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 2538905780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2818296243).

2538905780 is an abundant number, since it is smaller than the sum of its proper divisors (3097686706).

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

2538905780 is an equidigital number, since it uses as much as digits as its factorization.

2538905780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1233 (or 619 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 47.

The square root of 2538905780 is about 50387.5558049803. Note that the first 3 decimals coincide. The cubic root of 2538905780 is about 1364.2130346388.

The spelling of 2538905780 in words is "two billion, five hundred thirty-eight million, nine hundred five thousand, seven hundred eighty".