354220520 has 32 divisors (see below), whose sum is σ = 797682600. Its totient is φ = 141566208.

The previous prime is 354220519. The next prime is 354220523. The reversal of 354220520 is 25022453.

It can be written as a sum of positive squares in 4 ways, for example, as 179399236 + 174821284 = 13394^2 + 13222^2 .

It is a super-3 number, since 3×354220520³ (a number of 27 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (354220523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54062 + ... + 60258.

Almost surely, 2^354220520 is an apocalyptic number.

It is an amenable number.

354220520 is an abundant number, since it is smaller than the sum of its proper divisors (443462080).

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

354220520 is a wasteful number, since it uses less digits than its factorization.

354220520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7637 (or 7633 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 354220520 is about 18820.7470627497. The cubic root of 354220520 is about 707.5512546785.

Adding to 354220520 its reverse (25022453), we get a palindrome (379242973).

The spelling of 354220520 in words is "three hundred fifty-four million, two hundred twenty thousand, five hundred twenty".