220731328 has 28 divisors (see below), whose sum is σ = 439630312. Its totient is φ = 109958400.

The previous prime is 220731323. The next prime is 220731337. The reversal of 220731328 is 823137022.

It is a junction number, because it is equal to n+sod(n) for n = 220731296 and 220731305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220731323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11503 + ... + 23953.

Almost surely, 2^220731328 is an apocalyptic number.

It is an amenable number.

220731328 is a deficient number, since it is larger than the sum of its proper divisors (218898984).

220731328 is a wasteful number, since it uses less digits than its factorization.

220731328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12740 (or 12730 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 220731328 is about 14857.0295819858. The cubic root of 220731328 is about 604.3492563645.

The spelling of 220731328 in words is "two hundred twenty million, seven hundred thirty-one thousand, three hundred twenty-eight".