220648797 has 24 divisors (see below), whose sum is σ = 346592376. Its totient is φ = 134701056.

The previous prime is 220648789. The next prime is 220648807. The reversal of 220648797 is 797846022.

It can be written as a sum of positive squares in 4 ways, for example, as 50893956 + 169754841 = 7134^2 + 13029^2 .

It is not a de Polignac number, because 220648797 - 2³ = 220648789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220648697) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13828 + ... + 25149.

It is an arithmetic number, because the mean of its divisors is an integer number (14441349).

Almost surely, 2^220648797 is an apocalyptic number.

It is an amenable number.

220648797 is a deficient number, since it is larger than the sum of its proper divisors (125943579).

220648797 is a wasteful number, since it uses less digits than its factorization.

220648797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39037 (or 39034 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The square root of 220648797 is about 14854.2518155577. The cubic root of 220648797 is about 604.2739253175.

It can be divided in two parts, 220648 and 797, that added together give a triangular number (221445 = T₆₆₅).

The spelling of 220648797 in words is "two hundred twenty million, six hundred forty-eight thousand, seven hundred ninety-seven".