220724930 has 16 divisors (see below), whose sum is σ = 397474560. Its totient is φ = 88252272.

The previous prime is 220724927. The next prime is 220724939. The reversal of 220724930 is 39427022.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 220724893 and 220724902.

It is not an unprimeable number, because it can be changed into a prime (220724939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40847 + ... + 45933.

It is an arithmetic number, because the mean of its divisors is an integer number (24842160).

Almost surely, 2^220724930 is an apocalyptic number.

220724930 is a deficient number, since it is larger than the sum of its proper divisors (176749630).

220724930 is a wasteful number, since it uses less digits than its factorization.

220724930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9433.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 220724930 is about 14856.8142614761. The cubic root of 220724930 is about 604.3434171935.

The spelling of 220724930 in words is "two hundred twenty million, seven hundred twenty-four thousand, nine hundred thirty".