321120240 has 80 divisors (see below), whose sum is σ = 1137689088. Its totient is φ = 73398528.

The previous prime is 321120187. The next prime is 321120263. The reversal of 321120240 is 42021123.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93892 + ... + 97251.

Almost surely, 2^321120240 is an apocalyptic number.

321120240 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

321120240 is an abundant number, since it is smaller than the sum of its proper divisors (816568848).

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

321120240 is a wasteful number, since it uses less digits than its factorization.

321120240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191166 (or 191160 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 321120240 is about 17919.8281241757. The cubic root of 321120240 is about 684.7876088646.

Adding to 321120240 its reverse (42021123), we get a palindrome (363141363).

The spelling of 321120240 in words is "three hundred twenty-one million, one hundred twenty thousand, two hundred forty".