321053640 has 64 divisors (see below), whose sum is σ = 1013860800. Its totient is φ = 81107712.

The previous prime is 321053617. The next prime is 321053641. The reversal of 321053640 is 46350123.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 321053640.

It is not an unprimeable number, because it can be changed into a prime (321053641) by changing a digit.

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, 68127 + ... + 72686.

It is an arithmetic number, because the mean of its divisors is an integer number (15841575).

Almost surely, 2^321053640 is an apocalyptic number.

321053640 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

321053640 is an abundant number, since it is smaller than the sum of its proper divisors (692807160).

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

321053640 is a wasteful number, since it uses less digits than its factorization.

321053640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140846 (or 140842 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 321053640 is about 17917.9697510628. The cubic root of 321053640 is about 684.7402641815.

The spelling of 321053640 in words is "three hundred twenty-one million, fifty-three thousand, six hundred forty".