352640646 has 96 divisors (see below), whose sum is σ = 848240640. Its totient is φ = 105380352.

The previous prime is 352640633. The next prime is 352640653. The reversal of 352640646 is 646046253.

352640646 is a `hidden beast` number, since 3 + 5 + 2 + 6 + 4 + 0 + 646 = 666.

It is a super-2 number, since 2×352640646² = 248710850422594632, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 352640646.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 998806 + ... + 999158.

It is an arithmetic number, because the mean of its divisors is an integer number (8835840).

Almost surely, 2^352640646 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 352640646, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (424120320).

352640646 is an abundant number, since it is smaller than the sum of its proper divisors (495599994).

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

352640646 is a wasteful number, since it uses less digits than its factorization.

352640646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530 (or 527 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 36.

The square root of 352640646 is about 18778.7285512092. The cubic root of 352640646 is about 706.4977604009.

Adding to 352640646 its reverse (646046253), we get a palindrome (998686899).

The spelling of 352640646 in words is "three hundred fifty-two million, six hundred forty thousand, six hundred forty-six".