260221906 has 8 divisors (see below), whose sum is σ = 446094720. Its totient is φ = 111523668.

The previous prime is 260221889. The next prime is 260221933. The reversal of 260221906 is 609122062.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9293626 + ... + 9293653.

It is an arithmetic number, because the mean of its divisors is an integer number (55761840).

Almost surely, 2^260221906 is an apocalyptic number.

260221906 is a deficient number, since it is larger than the sum of its proper divisors (185872814).

260221906 is a wasteful number, since it uses less digits than its factorization.

260221906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18587288.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 260221906 is about 16131.3950419671. The cubic root of 260221906 is about 638.4319572264.

Adding to 260221906 its reverse (609122062), we get a palindrome (869343968).

The spelling of 260221906 in words is "two hundred sixty million, two hundred twenty-one thousand, nine hundred six".