2780052500 has 60 divisors (see below), whose sum is σ = 6437130084. Its totient is φ = 1046592000.

The previous prime is 2780052497. The next prime is 2780052511. The reversal of 2780052500 is 52500872.

It can be written as a sum of positive squares in 10 ways, for example, as 2087941636 + 692110864 = 45694^2 + 26308^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 9794 + ... + 75206.

Almost surely, 2^2780052500 is an apocalyptic number.

2780052500 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 2780052500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3218565042).

2780052500 is an abundant number, since it is smaller than the sum of its proper divisors (3657077584).

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

2780052500 is a wasteful number, since it uses less digits than its factorization.

2780052500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65454 (or 65437 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 29.

The square root of 2780052500 is about 52726.2031631332. The cubic root of 2780052500 is about 1406.1047191478.

The spelling of 2780052500 in words is "two billion, seven hundred eighty million, fifty-two thousand, five hundred".