421685382 has 16 divisors (see below), whose sum is σ = 852847920. Its totient is φ = 138982272.

The previous prime is 421685359. The next prime is 421685387. The reversal of 421685382 is 283586124.

It is a super-2 number, since 2×421685382² = 355637122784971848, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 421685382.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421685387) 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 7 ways as a sum of consecutive naturals, for example, 394303 + ... + 395370.

It is an arithmetic number, because the mean of its divisors is an integer number (53302995).

Almost surely, 2^421685382 is an apocalyptic number.

421685382 is an abundant number, since it is smaller than the sum of its proper divisors (431162538).

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

421685382 is a wasteful number, since it uses less digits than its factorization.

421685382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 789767.

The product of its digits is 92160, while the sum is 39.

The square root of 421685382 is about 20534.9794740584. The cubic root of 421685382 is about 749.8876169387.

It can be divided in two parts, 4216 and 85382, that added together give a palindrome (89598).

The spelling of 421685382 in words is "four hundred twenty-one million, six hundred eighty-five thousand, three hundred eighty-two".