421855544 has 32 divisors (see below), whose sum is σ = 913647600. Its totient is φ = 180472320.

The previous prime is 421855541. The next prime is 421855549. The reversal of 421855544 is 445558124.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 421855498 and 421855507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421855541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139499 + ... + 142490.

Almost surely, 2^421855544 is an apocalyptic number.

421855544 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

421855544 is an abundant number, since it is smaller than the sum of its proper divisors (491792056).

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

421855544 is a wasteful number, since it uses less digits than its factorization.

421855544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282023 (or 282019 counting only the distinct ones).

The product of its digits is 128000, while the sum is 38.

The square root of 421855544 is about 20539.1222792017. The cubic root of 421855544 is about 749.9884703413.

The spelling of 421855544 in words is "four hundred twenty-one million, eight hundred fifty-five thousand, five hundred forty-four".