260828221 has 8 divisors (see below), whose sum is σ = 262885824. Its totient is φ = 258779040.

The previous prime is 260828147. The next prime is 260828251. The reversal of 260828221 is 122828062.

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

It is a cyclic number.

It is not a de Polignac number, because 260828221 - 2¹³ = 260820029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (260828251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69216 + ... + 72886.

It is an arithmetic number, because the mean of its divisors is an integer number (32860728).

Almost surely, 2^260828221 is an apocalyptic number.

It is an amenable number.

260828221 is a deficient number, since it is larger than the sum of its proper divisors (2057603).

260828221 is a wasteful number, since it uses less digits than its factorization.

260828221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4211.

The product of its (nonzero) digits is 6144, while the sum is 31.

The square root of 260828221 is about 16150.1771197718. The cubic root of 260828221 is about 638.9274197685.

The spelling of 260828221 in words is "two hundred sixty million, eight hundred twenty-eight thousand, two hundred twenty-one".