351640734 has 16 divisors (see below), whose sum is σ = 709855488. Its totient is φ = 116117912.

The previous prime is 351640703. The next prime is 351640739. The reversal of 351640734 is 437046153.

351640734 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 351640695 and 351640704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (351640739) by changing a digit.

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, 273222 + ... + 274505.

It is an arithmetic number, because the mean of its divisors is an integer number (44365968).

Almost surely, 2^351640734 is an apocalyptic number.

351640734 is an abundant number, since it is smaller than the sum of its proper divisors (358214754).

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

351640734 is a wasteful number, since it uses less digits than its factorization.

351640734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 547839.

The product of its (nonzero) digits is 30240, while the sum is 33.

The square root of 351640734 is about 18752.0861239490. The cubic root of 351640734 is about 705.8293704980.

Adding to 351640734 its reverse (437046153), we get a palindrome (788686887).

The spelling of 351640734 in words is "three hundred fifty-one million, six hundred forty thousand, seven hundred thirty-four".