321412440 has 32 divisors (see below), whose sum is σ = 964237680. Its totient is φ = 85709952.

The previous prime is 321412411. The next prime is 321412453. The reversal of 321412440 is 44214123.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 1339099 + ... + 1339338.

Almost surely, 2^321412440 is an apocalyptic number.

321412440 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

321412440 is an abundant number, since it is smaller than the sum of its proper divisors (642825240).

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

321412440 is a wasteful number, since it uses less digits than its factorization.

321412440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2678451 (or 2678447 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 321412440 is about 17927.9792503227. The cubic root of 321412440 is about 684.9952510016.

Adding to 321412440 its reverse (44214123), we get a palindrome (365626563).

The spelling of 321412440 in words is "three hundred twenty-one million, four hundred twelve thousand, four hundred forty".