321699648 has 56 divisors (see below), whose sum is σ = 878636800. Its totient is φ = 103772160.

The previous prime is 321699589. The next prime is 321699649. The reversal of 321699648 is 846996123.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 321699597 and 321699606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321699649) 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, 21073 + ... + 32976.

Almost surely, 2^321699648 is an apocalyptic number.

It is an amenable number.

321699648 is an abundant number, since it is smaller than the sum of its proper divisors (556937152).

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

321699648 is a wasteful number, since it uses less digits than its factorization.

321699648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54095 (or 54085 counting only the distinct ones).

The product of its digits is 559872, while the sum is 48.

The square root of 321699648 is about 17935.9875111464. The cubic root of 321699648 is about 685.1992231370.

321699648 divided by its sum of digits (48) gives a palindrome (6702076).

The spelling of 321699648 in words is "three hundred twenty-one million, six hundred ninety-nine thousand, six hundred forty-eight".