2187278892 has 18 divisors (see below), whose sum is σ = 5528955068. Its totient is φ = 729092952.

The previous prime is 2187278869. The next prime is 2187278923. The reversal of 2187278892 is 2988727812.

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 30378838 + ... + 30378909.

Almost surely, 2^2187278892 is an apocalyptic number.

It is an amenable number.

2187278892 is an abundant number, since it is smaller than the sum of its proper divisors (3341676176).

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

2187278892 is a wasteful number, since it uses less digits than its factorization.

2187278892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60757757 (or 60757752 counting only the distinct ones).

The product of its digits is 1806336, while the sum is 54.

The square root of 2187278892 is about 46768.3535309936. The cubic root of 2187278892 is about 1298.0797867706.

The spelling of 2187278892 in words is "two billion, one hundred eighty-seven million, two hundred seventy-eight thousand, eight hundred ninety-two".