2786661988 has 24 divisors (see below), whose sum is σ = 5343446304. Its totient is φ = 1261080000.

The previous prime is 2786661973. The next prime is 2786662061. The reversal of 2786661988 is 8891666872.

It is a super-2 number, since 2×2786661988² = 15530970070728224288, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 129513 + ... + 149488.

It is an arithmetic number, because the mean of its divisors is an integer number (222643596).

Almost surely, 2^2786661988 is an apocalyptic number.

It is an amenable number.

2786661988 is a deficient number, since it is larger than the sum of its proper divisors (2556784316).

2786661988 is a wasteful number, since it uses less digits than its factorization.

2786661988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279243 (or 279241 counting only the distinct ones).

The product of its digits is 13934592, while the sum is 61.

The square root of 2786661988 is about 52788.8434046438. The cubic root of 2786661988 is about 1407.2181605755.

The spelling of 2786661988 in words is "two billion, seven hundred eighty-six million, six hundred sixty-one thousand, nine hundred eighty-eight".