220348428 has 12 divisors (see below), whose sum is σ = 514146360. Its totient is φ = 73449472.

The previous prime is 220348399. The next prime is 220348433. The reversal of 220348428 is 824843022.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9181173 + ... + 9181196.

It is an arithmetic number, because the mean of its divisors is an integer number (42845530).

Almost surely, 2^220348428 is an apocalyptic number.

It is an amenable number.

220348428 is an abundant number, since it is smaller than the sum of its proper divisors (293797932).

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

220348428 is a wasteful number, since it uses less digits than its factorization.

220348428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18362376 (or 18362374 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 33.

The square root of 220348428 is about 14844.1378328281. The cubic root of 220348428 is about 603.9996016254. Note that the first 3 decimals are identical.

The spelling of 220348428 in words is "two hundred twenty million, three hundred forty-eight thousand, four hundred twenty-eight".