421540320 has 96 divisors (see below), whose sum is σ = 1385620992. Its totient is φ = 107520512.

The previous prime is 421540319. The next prime is 421540333. The reversal of 421540320 is 23045124.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8052 + ... + 30131.

It is an arithmetic number, because the mean of its divisors is an integer number (14433552).

Almost surely, 2^421540320 is an apocalyptic number.

421540320 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

421540320 is an abundant number, since it is smaller than the sum of its proper divisors (964080672).

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

421540320 is a wasteful number, since it uses less digits than its factorization.

421540320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38224 (or 38216 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 421540320 is about 20531.4470995105. The cubic root of 421540320 is about 749.8016186422.

Adding to 421540320 its reverse (23045124), we get a palindrome (444585444).

The spelling of 421540320 in words is "four hundred twenty-one million, five hundred forty thousand, three hundred twenty".