340641644 has 24 divisors (see below), whose sum is σ = 685631520. Its totient is φ = 145057536.

The previous prime is 340641641. The next prime is 340641649. The reversal of 340641644 is 446146043.

It is a self number, because there is not a number n which added to its sum of digits gives 340641644.

It is not an unprimeable number, because it can be changed into a prime (340641641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34349 + ... + 43140.

It is an arithmetic number, because the mean of its divisors is an integer number (28567980).

Almost surely, 2^340641644 is an apocalyptic number.

It is an amenable number.

340641644 is an abundant number, since it is smaller than the sum of its proper divisors (344989876).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

340641644 is a wasteful number, since it uses less digits than its factorization.

340641644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77657 (or 77655 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 32.

The square root of 340641644 is about 18456.4797293525. The cubic root of 340641644 is about 698.3919851450.

Adding to 340641644 its reverse (446146043), we get a palindrome (786787687).

The spelling of 340641644 in words is "three hundred forty million, six hundred forty-one thousand, six hundred forty-four".