2780912772 has 36 divisors (see below), whose sum is σ = 7668578736. Its totient is φ = 842700720.

The previous prime is 2780912731. The next prime is 2780912807. The reversal of 2780912772 is 2772190872.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3510858 + ... + 3511649.

It is an arithmetic number, because the mean of its divisors is an integer number (213016076).

Almost surely, 2^2780912772 is an apocalyptic number.

2780912772 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

2780912772 is an abundant number, since it is smaller than the sum of its proper divisors (4887665964).

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

2780912772 is a wasteful number, since it uses less digits than its factorization.

2780912772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7022528 (or 7022523 counting only the distinct ones).

The product of its (nonzero) digits is 197568, while the sum is 45.

The square root of 2780912772 is about 52734.3604493313. The cubic root of 2780912772 is about 1406.2497413214.

The spelling of 2780912772 in words is "two billion, seven hundred eighty million, nine hundred twelve thousand, seven hundred seventy-two".