355216290 has 128 divisors (see below), whose sum is σ = 1034256384. Its totient is φ = 76896000.

The previous prime is 355216247. The next prime is 355216297. The reversal of 355216290 is 92612553.

It is a super-2 number, since 2×355216290² = 252357225362728200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (355216297) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 131655 + ... + 134325.

It is an arithmetic number, because the mean of its divisors is an integer number (8080128).

Almost surely, 2^355216290 is an apocalyptic number.

355216290 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 355216290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (517128192).

355216290 is an abundant number, since it is smaller than the sum of its proper divisors (679040094).

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

355216290 is a wasteful number, since it uses less digits than its factorization.

355216290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2736.

The product of its (nonzero) digits is 16200, while the sum is 33.

The square root of 355216290 is about 18847.1825480627. The cubic root of 355216290 is about 708.2136472597.

The spelling of 355216290 in words is "three hundred fifty-five million, two hundred sixteen thousand, two hundred ninety".