350721620 has 12 divisors (see below), whose sum is σ = 736515444. Its totient is φ = 140288640.

The previous prime is 350721607. The next prime is 350721643. The reversal of 350721620 is 26127053.

It can be written as a sum of positive squares in 2 ways, for example, as 138203536 + 212518084 = 11756^2 + 14578^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 350721620.

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, 8768021 + ... + 8768060.

It is an arithmetic number, because the mean of its divisors is an integer number (61376287).

Almost surely, 2^350721620 is an apocalyptic number.

It is an amenable number.

350721620 is an abundant number, since it is smaller than the sum of its proper divisors (385793824).

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

350721620 is a wasteful number, since it uses less digits than its factorization.

350721620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17536090 (or 17536088 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 350721620 is about 18727.5631089579. The cubic root of 350721620 is about 705.2138713667.

Adding to 350721620 its reverse (26127053), we get a palindrome (376848673).

The spelling of 350721620 in words is "three hundred fifty million, seven hundred twenty-one thousand, six hundred twenty".