351631746 has 64 divisors (see below), whose sum is σ = 830476800. Its totient is φ = 109969488.

The previous prime is 351631697. The next prime is 351631747. The reversal of 351631746 is 647136153.

It is a self number, because there is not a number n which added to its sum of digits gives 351631746.

It is not an unprimeable number, because it can be changed into a prime (351631747) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 108181 + ... + 111383.

It is an arithmetic number, because the mean of its divisors is an integer number (12976200).

Almost surely, 2^351631746 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 351631746, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (415238400).

351631746 is an abundant number, since it is smaller than the sum of its proper divisors (478845054).

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

351631746 is a wasteful number, since it uses less digits than its factorization.

351631746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3340 (or 3334 counting only the distinct ones).

The product of its digits is 45360, while the sum is 36.

The square root of 351631746 is about 18751.8464690814. The cubic root of 351631746 is about 705.8233567385.

Adding to 351631746 its reverse (647136153), we get a palindrome (998767899).

The spelling of 351631746 in words is "three hundred fifty-one million, six hundred thirty-one thousand, seven hundred forty-six".