1340272646 has 4 divisors (see below), whose sum is σ = 2010408972. Its totient is φ = 670136322.

The previous prime is 1340272621. The next prime is 1340272649. The reversal of 1340272646 is 6462720431.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340272649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335068160 + ... + 335068163.

It is an arithmetic number, because the mean of its divisors is an integer number (502602243).

Almost surely, 2^1340272646 is an apocalyptic number.

1340272646 is a deficient number, since it is larger than the sum of its proper divisors (670136326).

1340272646 is an equidigital number, since it uses as much as digits as its factorization.

1340272646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 670136325.

The product of its (nonzero) digits is 48384, while the sum is 35.

The square root of 1340272646 is about 36609.7343066021. The cubic root of 1340272646 is about 1102.5485387830.

The spelling of 1340272646 in words is "one billion, three hundred forty million, two hundred seventy-two thousand, six hundred forty-six".