220785738 has 32 divisors (see below), whose sum is σ = 476159040. Its totient is φ = 68019840.

The previous prime is 220785731. The next prime is 220785797. The reversal of 220785738 is 837587022.

It is a self number, because there is not a number n which added to its sum of digits gives 220785738.

It is not an unprimeable number, because it can be changed into a prime (220785731) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 18945 + ... + 28292.

It is an arithmetic number, because the mean of its divisors is an integer number (14879970).

Almost surely, 2^220785738 is an apocalyptic number.

220785738 is an abundant number, since it is smaller than the sum of its proper divisors (255373302).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

220785738 is a wasteful number, since it uses less digits than its factorization.

220785738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47302.

The product of its (nonzero) digits is 188160, while the sum is 42.

The square root of 220785738 is about 14858.8605888877. The cubic root of 220785738 is about 604.3989094003.

The spelling of 220785738 in words is "two hundred twenty million, seven hundred eighty-five thousand, seven hundred thirty-eight".