421544382 has 16 divisors (see below), whose sum is σ = 963530112. Its totient is φ = 120441240.

The previous prime is 421544371. The next prime is 421544399. The reversal of 421544382 is 283445124.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5018344 + ... + 5018427.

It is an arithmetic number, because the mean of its divisors is an integer number (60220632).

Almost surely, 2^421544382 is an apocalyptic number.

421544382 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

421544382 is an abundant number, since it is smaller than the sum of its proper divisors (541985730).

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

421544382 is a wasteful number, since it uses less digits than its factorization.

421544382 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10036783.

The product of its digits is 30720, while the sum is 33.

The square root of 421544382 is about 20531.5460206970. The cubic root of 421544382 is about 749.8040270195.

The spelling of 421544382 in words is "four hundred twenty-one million, five hundred forty-four thousand, three hundred eighty-two".