220720004 has 12 divisors (see below), whose sum is σ = 386775564. Its totient is φ = 110212704.

The previous prime is 220720001. The next prime is 220720007. The reversal of 220720004 is 400027022.

It is an interprime number because it is at equal distance from previous prime (220720001) and next prime (220720007).

It can be written as a sum of positive squares in 2 ways, for example, as 54051904 + 166668100 = 7352^2 + 12910^2 .

It is not an unprimeable number, because it can be changed into a prime (220720001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33419 + ... + 39474.

It is an arithmetic number, because the mean of its divisors is an integer number (32231297).

Almost surely, 2^220720004 is an apocalyptic number.

It is an amenable number.

220720004 is a deficient number, since it is larger than the sum of its proper divisors (166055560).

220720004 is a wasteful number, since it uses less digits than its factorization.

220720004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73654 (or 73652 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 17.

The square root of 220720004 is about 14856.6484780384. The cubic root of 220720004 is about 604.3389213748.

Adding to 220720004 its reverse (400027022), we get a palindrome (620747026).

The spelling of 220720004 in words is "two hundred twenty million, seven hundred twenty thousand, four".