320021874 has 32 divisors (see below), whose sum is σ = 711829440. Its totient is φ = 106573536.

The previous prime is 320021869. The next prime is 320021879. The reversal of 320021874 is 478120023.

It is an interprime number because it is at equal distance from previous prime (320021869) and next prime (320021879).

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

It is not an unprimeable number, because it can be changed into a prime (320021879) 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, 74982 + ... + 79134.

It is an arithmetic number, because the mean of its divisors is an integer number (22244670).

Almost surely, 2^320021874 is an apocalyptic number.

320021874 is an abundant number, since it is smaller than the sum of its proper divisors (391807566).

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

320021874 is a wasteful number, since it uses less digits than its factorization.

320021874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5591 (or 5585 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 320021874 is about 17889.1552064372. The cubic root of 320021874 is about 684.0059633214.

Adding to 320021874 its reverse (478120023), we get a palindrome (798141897).

The spelling of 320021874 in words is "three hundred twenty million, twenty-one thousand, eight hundred seventy-four".