1340644574 has 8 divisors (see below), whose sum is σ = 2016569520. Its totient is φ = 668454736.

The previous prime is 1340644549. The next prime is 1340644577. The reversal of 1340644574 is 4754460431.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340644577) by changing a digit.

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, 932879 + ... + 934314.

It is an arithmetic number, because the mean of its divisors is an integer number (252071190).

Almost surely, 2^1340644574 is an apocalyptic number.

1340644574 is a deficient number, since it is larger than the sum of its proper divisors (675924946).

1340644574 is a wasteful number, since it uses less digits than its factorization.

1340644574 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1867554.

The product of its (nonzero) digits is 161280, while the sum is 38.

The square root of 1340644574 is about 36614.8135868531. The cubic root of 1340644574 is about 1102.6505157324.

The spelling of 1340644574 in words is "one billion, three hundred forty million, six hundred forty-four thousand, five hundred seventy-four".