2781188730 has 32 divisors (see below), whose sum is σ = 7416504000. Its totient is φ = 741650256.

The previous prime is 2781188717. The next prime is 2781188743. The reversal of 2781188730 is 378811872.

2781188730 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2781188717) and next prime (2781188743).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5150080 + ... + 5150619.

It is an arithmetic number, because the mean of its divisors is an integer number (231765750).

Almost surely, 2^2781188730 is an apocalyptic number.

2781188730 is an abundant number, since it is smaller than the sum of its proper divisors (4635315270).

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

2781188730 is a wasteful number, since it uses less digits than its factorization.

2781188730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10300715 (or 10300709 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 45.

The square root of 2781188730 is about 52736.9768758127. The cubic root of 2781188730 is about 1406.2962551896.

The spelling of 2781188730 in words is "two billion, seven hundred eighty-one million, one hundred eighty-eight thousand, seven hundred thirty".