220385730 has 16 divisors (see below), whose sum is σ = 528925824. Its totient is φ = 58769520.

The previous prime is 220385729. The next prime is 220385743. The reversal of 220385730 is 37583022.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 7346191 = 220385730 / (2 + 2 + 0 + 3 + 8 + 5 + 7 + 3 + 0).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3673066 + ... + 3673125.

It is an arithmetic number, because the mean of its divisors is an integer number (33057864).

Almost surely, 2^220385730 is an apocalyptic number.

220385730 is an abundant number, since it is smaller than the sum of its proper divisors (308540094).

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

220385730 is a wasteful number, since it uses less digits than its factorization.

220385730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7346201.

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 220385730 is about 14845.3942352502. The cubic root of 220385730 is about 604.0336826822.

The spelling of 220385730 in words is "two hundred twenty million, three hundred eighty-five thousand, seven hundred thirty".