420122028 has 12 divisors (see below), whose sum is σ = 980284760. Its totient is φ = 140040672.

The previous prime is 420122009. The next prime is 420122029. The reversal of 420122028 is 820221024.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 420121995 and 420122013.

It is not an unprimeable number, because it can be changed into a prime (420122029) 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 3 ways as a sum of consecutive naturals, for example, 17505073 + ... + 17505096.

Almost surely, 2^420122028 is an apocalyptic number.

It is an amenable number.

420122028 is an abundant number, since it is smaller than the sum of its proper divisors (560162732).

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

420122028 is a wasteful number, since it uses less digits than its factorization.

420122028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35010176 (or 35010174 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 420122028 is about 20496.8784940537. The cubic root of 420122028 is about 748.9597596448.

The spelling of 420122028 in words is "four hundred twenty million, one hundred twenty-two thousand, twenty-eight".