421827732 has 36 divisors (see below), whose sum is σ = 1129011156. Its totient is φ = 132337920.

The previous prime is 421827727. The next prime is 421827733. The reversal of 421827732 is 237728124.

It can be written as a sum of positive squares in 2 ways, for example, as 392277636 + 29550096 = 19806^2 + 5436^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421827733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 344019 + ... + 345242.

It is an arithmetic number, because the mean of its divisors is an integer number (31361421).

Almost surely, 2^421827732 is an apocalyptic number.

It is an amenable number.

421827732 is an abundant number, since it is smaller than the sum of its proper divisors (707183424).

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

421827732 is a wasteful number, since it uses less digits than its factorization.

421827732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 689288 (or 689283 counting only the distinct ones).

The product of its digits is 37632, while the sum is 36.

The square root of 421827732 is about 20538.4452186625. The cubic root of 421827732 is about 749.9719882871.

The spelling of 421827732 in words is "four hundred twenty-one million, eight hundred twenty-seven thousand, seven hundred thirty-two".