421116028 has 24 divisors (see below), whose sum is σ = 778426880. Its totient is φ = 199024560.

The previous prime is 421116013. The next prime is 421116029. The reversal of 421116028 is 820611124.

It is a junction number, because it is equal to n+sod(n) for n = 421115993 and 421116011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421116029) 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, 34158 + ... + 44821.

Almost surely, 2^421116028 is an apocalyptic number.

It is an amenable number.

421116028 is a deficient number, since it is larger than the sum of its proper divisors (357310852).

421116028 is a wasteful number, since it uses less digits than its factorization.

421116028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79057 (or 79055 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 421116028 is about 20521.1117632549. Note that the first 3 decimals coincide. The cubic root of 421116028 is about 749.5499688314.

The spelling of 421116028 in words is "four hundred twenty-one million, one hundred sixteen thousand, twenty-eight".