355720385 has 4 divisors (see below), whose sum is σ = 426864468. Its totient is φ = 284576304.

The previous prime is 355720349. The next prime is 355720397. The reversal of 355720385 is 583027553.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 183900721 + 171819664 = 13561^2 + 13108^2 .

It is a cyclic number.

It is not a de Polignac number, because 355720385 - 2²⁰ = 354671809 is a prime.

It is a Duffinian number.

It is a Curzon 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, 35572034 + ... + 35572043.

It is an arithmetic number, because the mean of its divisors is an integer number (106716117).

Almost surely, 2^355720385 is an apocalyptic number.

It is an amenable number.

355720385 is a deficient number, since it is larger than the sum of its proper divisors (71144083).

355720385 is an equidigital number, since it uses as much as digits as its factorization.

355720385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71144082.

The product of its (nonzero) digits is 126000, while the sum is 38.

The square root of 355720385 is about 18860.5510258847. The cubic root of 355720385 is about 708.5485025979.

The spelling of 355720385 in words is "three hundred fifty-five million, seven hundred twenty thousand, three hundred eighty-five".