220747490 has 16 divisors (see below), whose sum is σ = 397544760. Its totient is φ = 88254720.

The previous prime is 220747487. The next prime is 220747511. The reversal of 220747490 is 94747022.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 202863049 + 17884441 = 14243^2 + 4229^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 220747490.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 21860 + ... + 30320.

Almost surely, 2^220747490 is an apocalyptic number.

220747490 is a deficient number, since it is larger than the sum of its proper divisors (176797270).

220747490 is a wasteful number, since it uses less digits than its factorization.

220747490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11077.

The product of its (nonzero) digits is 28224, while the sum is 35.

The square root of 220747490 is about 14857.5734896382. The cubic root of 220747490 is about 604.3640062030.

The spelling of 220747490 in words is "two hundred twenty million, seven hundred forty-seven thousand, four hundred ninety".