2781695220 has 24 divisors (see below), whose sum is σ = 7788746784. Its totient is φ = 741785376.

The previous prime is 2781695219. The next prime is 2781695251. The reversal of 2781695220 is 225961872.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23180734 + ... + 23180853.

It is an arithmetic number, because the mean of its divisors is an integer number (324531116).

Almost surely, 2^2781695220 is an apocalyptic number.

2781695220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2781695220 is an abundant number, since it is smaller than the sum of its proper divisors (5007051564).

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

2781695220 is a wasteful number, since it uses less digits than its factorization.

2781695220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46361599 (or 46361597 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 42.

The square root of 2781695220 is about 52741.7786958309. The cubic root of 2781695220 is about 1406.3816181796.

The spelling of 2781695220 in words is "two billion, seven hundred eighty-one million, six hundred ninety-five thousand, two hundred twenty".