220020428 has 12 divisors (see below), whose sum is σ = 387489312. Its totient is φ = 109309200.

The previous prime is 220020421. The next prime is 220020433. The reversal of 220020428 is 824020022.

It is not an unprimeable number, because it can be changed into a prime (220020421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 174548 + ... + 175803.

It is an arithmetic number, because the mean of its divisors is an integer number (32290776).

Almost surely, 2^220020428 is an apocalyptic number.

It is an amenable number.

220020428 is a deficient number, since it is larger than the sum of its proper divisors (167468884).

220020428 is a wasteful number, since it uses less digits than its factorization.

220020428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350512 (or 350510 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 220020428 is about 14833.0855859460. The cubic root of 220020428 is about 603.6997579454.

The spelling of 220020428 in words is "two hundred twenty million, twenty thousand, four hundred twenty-eight".