344785991 has 12 divisors (see below), whose sum is σ = 379608600. Its totient is φ = 312921840.

The previous prime is 344785981. The next prime is 344786021. The reversal of 344785991 is 199587443.

It is not a de Polignac number, because 344785991 - 2¹⁸ = 344523847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (344785981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 83780 + ... + 87798.

It is an arithmetic number, because the mean of its divisors is an integer number (31634050).

Almost surely, 2^344785991 is an apocalyptic number.

344785991 is a deficient number, since it is larger than the sum of its proper divisors (34822609).

344785991 is a wasteful number, since it uses less digits than its factorization.

344785991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4750 (or 4739 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 50.

The square root of 344785991 is about 18568.4137987067. The cubic root of 344785991 is about 701.2128571894.

The spelling of 344785991 in words is "three hundred forty-four million, seven hundred eighty-five thousand, nine hundred ninety-one".