352521040 has 20 divisors (see below), whose sum is σ = 819611604. Its totient is φ = 141008384.

The previous prime is 352521031. The next prime is 352521053. The reversal of 352521040 is 40125253.

It can be written as a sum of positive squares in 2 ways, for example, as 223562304 + 128958736 = 14952^2 + 11356^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2203177 + ... + 2203336.

Almost surely, 2^352521040 is an apocalyptic number.

It is an amenable number.

352521040 is an abundant number, since it is smaller than the sum of its proper divisors (467090564).

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

352521040 is a wasteful number, since it uses less digits than its factorization.

352521040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4406526 (or 4406520 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 352521040 is about 18775.5436672284. The cubic root of 352521040 is about 706.4178765045.

Adding to 352521040 its reverse (40125253), we get a palindrome (392646293).

The spelling of 352521040 in words is "three hundred fifty-two million, five hundred twenty-one thousand, forty".