421028986 has 16 divisors (see below), whose sum is σ = 722283264. Its totient is φ = 180311184.

The previous prime is 421028983. The next prime is 421029029. The reversal of 421028986 is 689820124.

It is not an unprimeable number, because it can be changed into a prime (421028983) 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 7 ways as a sum of consecutive naturals, for example, 10831 + ... + 30973.

It is an arithmetic number, because the mean of its divisors is an integer number (45142704).

Almost surely, 2^421028986 is an apocalyptic number.

421028986 is a deficient number, since it is larger than the sum of its proper divisors (301254278).

421028986 is a wasteful number, since it uses less digits than its factorization.

421028986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21645.

The product of its (nonzero) digits is 55296, while the sum is 40.

The square root of 421028986 is about 20518.9908621257. The cubic root of 421028986 is about 749.4983228719.

The spelling of 421028986 in words is "four hundred twenty-one million, twenty-eight thousand, nine hundred eighty-six".