421411440 has 160 divisors (see below), whose sum is σ = 1340539200. Its totient is φ = 109486080.

The previous prime is 421411439. The next prime is 421411477. The reversal of 421411440 is 44114124.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2328150 + ... + 2328330.

It is an arithmetic number, because the mean of its divisors is an integer number (8378370).

Almost surely, 2^421411440 is an apocalyptic number.

421411440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421411440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (670269600).

421411440 is an abundant number, since it is smaller than the sum of its proper divisors (919127760).

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

421411440 is a wasteful number, since it uses less digits than its factorization.

421411440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395 (or 389 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 421411440 is about 20528.3082595717. The cubic root of 421411440 is about 749.7251971012.

Adding to 421411440 its reverse (44114124), we get a palindrome (465525564).

The spelling of 421411440 in words is "four hundred twenty-one million, four hundred eleven thousand, four hundred forty".