1340778986 has 8 divisors (see below), whose sum is σ = 2011456260. Its totient is φ = 670293568.

The previous prime is 1340778979. The next prime is 1340779019. The reversal of 1340778986 is 6898770431.

It can be written as a sum of positive squares in 2 ways, for example, as 1059177025 + 281601961 = 32545^2 + 16781^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28991 + ... + 59346.

Almost surely, 2^1340778986 is an apocalyptic number.

1340778986 is a deficient number, since it is larger than the sum of its proper divisors (670677274).

1340778986 is an equidigital number, since it uses as much as digits as its factorization.

1340778986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95928.

The product of its (nonzero) digits is 2032128, while the sum is 53.

The square root of 1340778986 is about 36616.6490274574. The cubic root of 1340778986 is about 1102.6873648001.

The spelling of 1340778986 in words is "one billion, three hundred forty million, seven hundred seventy-eight thousand, nine hundred eighty-six".