421227432 has 64 divisors (see below), whose sum is σ = 1189944000. Its totient is φ = 138025152.

The previous prime is 421227431. The next prime is 421227437. The reversal of 421227432 is 234722124.

421227432 is a `hidden beast` number, since 4 + 2 + 1 + 227 + 432 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 421227396 and 421227405.

It is not an unprimeable number, because it can be changed into a prime (421227431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3783 + ... + 29270.

It is an arithmetic number, because the mean of its divisors is an integer number (18592875).

Almost surely, 2^421227432 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421227432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (594972000).

421227432 is an abundant number, since it is smaller than the sum of its proper divisors (768716568).

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

421227432 is a wasteful number, since it uses less digits than its factorization.

421227432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33127 (or 33117 counting only the distinct ones).

The product of its digits is 5376, while the sum is 27.

The square root of 421227432 is about 20523.8259591140. The cubic root of 421227432 is about 749.6160594864.

Adding to 421227432 its reverse (234722124), we get a palindrome (655949556).

The spelling of 421227432 in words is "four hundred twenty-one million, two hundred twenty-seven thousand, four hundred thirty-two".