2502778000 has 80 divisors (see below), whose sum is σ = 6086396160. Its totient is φ = 995376000.

The previous prime is 2502777997. The next prime is 2502778001. The reversal of 2502778000 is 8772052.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (2502778001) 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, 354505 + ... + 361495.

It is an arithmetic number, because the mean of its divisors is an integer number (76079952).

Almost surely, 2^2502778000 is an apocalyptic number.

2502778000 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 2502778000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3043198080).

2502778000 is an abundant number, since it is smaller than the sum of its proper divisors (3583618160).

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

2502778000 is a wasteful number, since it uses less digits than its factorization.

2502778000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7193 (or 7177 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 31.

The square root of 2502778000 is about 50027.7722870007. The cubic root of 2502778000 is about 1357.7113323511.

The spelling of 2502778000 in words is "two billion, five hundred two million, seven hundred seventy-eight thousand".