321443668 has 24 divisors (see below), whose sum is σ = 692340992. Its totient is φ = 127164384.

The previous prime is 321443663. The next prime is 321443671. The reversal of 321443668 is 866344123.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321443663) 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, 441180 + ... + 441907.

Almost surely, 2^321443668 is an apocalyptic number.

It is an amenable number.

321443668 is an abundant number, since it is smaller than the sum of its proper divisors (370897324).

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

321443668 is a wasteful number, since it uses less digits than its factorization.

321443668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 883111 (or 883109 counting only the distinct ones).

The product of its digits is 82944, while the sum is 37.

The square root of 321443668 is about 17928.8501583342. The cubic root of 321443668 is about 685.0174346886.

The spelling of 321443668 in words is "three hundred twenty-one million, four hundred forty-three thousand, six hundred sixty-eight".