321440616 has 64 divisors (see below), whose sum is σ = 1020451200. Its totient is φ = 91839744.

The previous prime is 321440597. The next prime is 321440621. The reversal of 321440616 is 616044123.

321440616 is a `hidden beast` number, since 3 + 2 + 1 + 4 + 40 + 616 = 666.

It is a super-2 number, since 2×321440616² = 206648139228918912, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 321440616.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 104785 + ... + 107808.

It is an arithmetic number, because the mean of its divisors is an integer number (15944550).

Almost surely, 2^321440616 is an apocalyptic number.

321440616 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

321440616 is an abundant number, since it is smaller than the sum of its proper divisors (699010584).

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

321440616 is a wasteful number, since it uses less digits than its factorization.

321440616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212615 (or 212605 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 321440616 is about 17928.7650439176. The cubic root of 321440616 is about 685.0152666781.

Adding to 321440616 its reverse (616044123), we get a palindrome (937484739).

The spelling of 321440616 in words is "three hundred twenty-one million, four hundred forty thousand, six hundred sixteen".