421878422 has 16 divisors (see below), whose sum is σ = 723528960. Its totient is φ = 180727848.

The previous prime is 421878389. The next prime is 421878427. The reversal of 421878422 is 224878124.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421878427) 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, 38213 + ... + 47999.

It is an arithmetic number, because the mean of its divisors is an integer number (45220560).

Almost surely, 2^421878422 is an apocalyptic number.

421878422 is a deficient number, since it is larger than the sum of its proper divisors (301650538).

421878422 is a wasteful number, since it uses less digits than its factorization.

421878422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12875.

The product of its digits is 57344, while the sum is 38.

The square root of 421878422 is about 20539.6792087900. The cubic root of 421878422 is about 750.0020278464.

The spelling of 421878422 in words is "four hundred twenty-one million, eight hundred seventy-eight thousand, four hundred twenty-two".