220728750 has 80 divisors (see below), whose sum is σ = 601907328. Its totient is φ = 53500000.

The previous prime is 220728727. The next prime is 220728751. The reversal of 220728750 is 57827022.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220728751) 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 39 ways as a sum of consecutive naturals, for example, 38575 + ... + 43925.

Almost surely, 2^220728750 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 220728750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (300953664).

220728750 is an abundant number, since it is smaller than the sum of its proper divisors (381178578).

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

220728750 is a wasteful number, since it uses less digits than its factorization.

220728750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5387 (or 5372 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 33.

The square root of 220728750 is about 14856.9428214556. The cubic root of 220728750 is about 604.3469035518.

The spelling of 220728750 in words is "two hundred twenty million, seven hundred twenty-eight thousand, seven hundred fifty".