421815416 has 32 divisors (see below), whose sum is σ = 865583280. Its totient is φ = 191116800.

The previous prime is 421815413. The next prime is 421815437. The reversal of 421815416 is 614518124.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421815413) 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, 20336 + ... + 35456.

Almost surely, 2^421815416 is an apocalyptic number.

It is an amenable number.

421815416 is an abundant number, since it is smaller than the sum of its proper divisors (443767864).

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

421815416 is a wasteful number, since it uses less digits than its factorization.

421815416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15455 (or 15451 counting only the distinct ones).

The product of its digits is 7680, while the sum is 32.

The square root of 421815416 is about 20538.1453885204. The cubic root of 421815416 is about 749.9646893005.

The spelling of 421815416 in words is "four hundred twenty-one million, eight hundred fifteen thousand, four hundred sixteen".