217436361428 has 24 divisors (see below), whose sum is σ = 447036996000. Its totient is φ = 91232039520.

The previous prime is 217436361419. The next prime is 217436361479. The reversal of 217436361428 is 824163634712.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 190066178 + ... + 190067321.

It is an arithmetic number, because the mean of its divisors is an integer number (18626541500).

Almost surely, 2^217436361428 is an apocalyptic number.

It is an amenable number.

217436361428 is an abundant number, since it is smaller than the sum of its proper divisors (229600634572).

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

217436361428 is a wasteful number, since it uses less digits than its factorization.

217436361428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380133527 (or 380133525 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 47.

The spelling of 217436361428 in words is "two hundred seventeen billion, four hundred thirty-six million, three hundred sixty-one thousand, four hundred twenty-eight".