322878240 has 72 divisors (see below), whose sum is σ = 1101826908. Its totient is φ = 86100480.

The previous prime is 322878223. The next prime is 322878247. The reversal of 322878240 is 42878223.

It can be written as a sum of positive squares in 2 ways, for example, as 297355536 + 25522704 = 17244^2 + 5052^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 322878195 and 322878204.

It is not an unprimeable number, because it can be changed into a prime (322878247) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 110671 + ... + 113550.

Almost surely, 2^322878240 is an apocalyptic number.

322878240 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

322878240 is an abundant number, since it is smaller than the sum of its proper divisors (778948668).

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

322878240 is a wasteful number, since it uses less digits than its factorization.

322878240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224242 (or 224231 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 36.

The square root of 322878240 is about 17968.8129824983. The cubic root of 322878240 is about 686.0349779727.

The spelling of 322878240 in words is "three hundred twenty-two million, eight hundred seventy-eight thousand, two hundred forty".