1340352471 has 16 divisors (see below), whose sum is σ = 1893823200. Its totient is φ = 840311808.

The previous prime is 1340352467. The next prime is 1340352509. The reversal of 1340352471 is 1742530431.

It is a happy number.

It is not a de Polignac number, because 1340352471 - 2² = 1340352467 is a prime.

It is a super-3 number, since 3×1340352471³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340352571) 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 15 ways as a sum of consecutive naturals, for example, 55545 + ... + 75933.

It is an arithmetic number, because the mean of its divisors is an integer number (118363950).

Almost surely, 2^1340352471 is an apocalyptic number.

1340352471 is a deficient number, since it is larger than the sum of its proper divisors (553470729).

1340352471 is a wasteful number, since it uses less digits than its factorization.

1340352471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21698.

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 1340352471 is about 36610.8245058753. The cubic root of 1340352471 is about 1102.5704271628.

The spelling of 1340352471 in words is "one billion, three hundred forty million, three hundred fifty-two thousand, four hundred seventy-one".