1240640342 has 16 divisors (see below), whose sum is σ = 1890250992. Its totient is φ = 610611360.

The previous prime is 1240640339. The next prime is 1240640351. The reversal of 1240640342 is 2430460421.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32492 + ... + 59472.

It is an arithmetic number, because the mean of its divisors is an integer number (118140687).

Almost surely, 2^1240640342 is an apocalyptic number.

1240640342 is a deficient number, since it is larger than the sum of its proper divisors (649610650).

1240640342 is a wasteful number, since it uses less digits than its factorization.

1240640342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27343.

The product of its (nonzero) digits is 4608, while the sum is 26.

The square root of 1240640342 is about 35222.7247952228. The cubic root of 1240640342 is about 1074.5219701190.

The spelling of 1240640342 in words is "one billion, two hundred forty million, six hundred forty thousand, three hundred forty-two".