6978732786 has 24 divisors (see below), whose sum is σ = 15205067280. Its totient is φ = 2313247416.

The previous prime is 6978732779. The next prime is 6978732799. The reversal of 6978732786 is 6872378796.

It is a super-2 number, since 2×6978732786² = 97405422596782643592, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1079760 + ... + 1086203.

It is an arithmetic number, because the mean of its divisors is an integer number (633544470).

Almost surely, 2^6978732786 is an apocalyptic number.

6978732786 is an abundant number, since it is smaller than the sum of its proper divisors (8226334494).

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

6978732786 is a wasteful number, since it uses less digits than its factorization.

6978732786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2166150 (or 2166147 counting only the distinct ones).

The product of its digits is 42674688, while the sum is 63.

The square root of 6978732786 is about 83538.8100585590. The cubic root of 6978732786 is about 1910.9919453011.

The spelling of 6978732786 in words is "six billion, nine hundred seventy-eight million, seven hundred thirty-two thousand, seven hundred eighty-six".