421765632 has 60 divisors (see below), whose sum is σ = 1217257470. Its totient is φ = 140587008.

The previous prime is 421765621. The next prime is 421765637. The reversal of 421765632 is 236567124.

421765632 is a `hidden beast` number, since 4 + 2 + 17 + 6 + 5 + 632 = 666.

It can be written as a sum of positive squares in only one way, i.e., 420086016 + 1679616 = 20496^2 + 1296^2 .

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

It is not an unprimeable number, because it can be changed into a prime (421765637) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 41157 + ... + 50372.

Almost surely, 2^421765632 is an apocalyptic number.

It is an amenable number.

421765632 is an abundant number, since it is smaller than the sum of its proper divisors (795491838).

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

421765632 is an equidigital number, since it uses as much as digits as its factorization.

421765632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91553 (or 91534 counting only the distinct ones).

The product of its digits is 60480, while the sum is 36.

The square root of 421765632 is about 20536.9333640639. The cubic root of 421765632 is about 749.9351837320.

The spelling of 421765632 in words is "four hundred twenty-one million, seven hundred sixty-five thousand, six hundred thirty-two".