321267648 has 84 divisors (see below), whose sum is σ = 920529528. Its totient is φ = 98841600.

The previous prime is 321267643. The next prime is 321267659. The reversal of 321267648 is 846762123.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321267643) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27498 + ... + 37398.

Almost surely, 2^321267648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 321267648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (460264764).

321267648 is an abundant number, since it is smaller than the sum of its proper divisors (599261880).

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

321267648 is a wasteful number, since it uses less digits than its factorization.

321267648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9942 (or 9919 counting only the distinct ones).

The product of its digits is 96768, while the sum is 39.

The square root of 321267648 is about 17923.9406381521. The cubic root of 321267648 is about 684.8923751562.

The spelling of 321267648 in words is "three hundred twenty-one million, two hundred sixty-seven thousand, six hundred forty-eight".