420228028 has 24 divisors (see below), whose sum is σ = 804101760. Its totient is φ = 190572720.

The previous prime is 420228023. The next prime is 420228037. The reversal of 420228028 is 820822024.

It is a junction number, because it is equal to n+sod(n) for n = 420227987 and 420228005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420228023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8713 + ... + 30271.

It is an arithmetic number, because the mean of its divisors is an integer number (33504240).

Almost surely, 2^420228028 is an apocalyptic number.

It is an amenable number.

420228028 is a deficient number, since it is larger than the sum of its proper divisors (383873732).

420228028 is a wasteful number, since it uses less digits than its factorization.

420228028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22017 (or 22015 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 28.

The square root of 420228028 is about 20499.4640905561. The cubic root of 420228028 is about 749.0227437727.

The spelling of 420228028 in words is "four hundred twenty million, two hundred twenty-eight thousand, twenty-eight".