421578240 has 160 divisors (see below), whose sum is σ = 1427453280. Its totient is φ = 105775104.

The previous prime is 421578239. The next prime is 421578263. The reversal of 421578240 is 42875124.

It is a tau number, because it is divible by the number of its divisors (160).

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, 128946 + ... + 132174.

It is an arithmetic number, because the mean of its divisors is an integer number (8921583).

Almost surely, 2^421578240 is an apocalyptic number.

421578240 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 421578240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (713726640).

421578240 is an abundant number, since it is smaller than the sum of its proper divisors (1005875040).

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

421578240 is a wasteful number, since it uses less digits than its factorization.

421578240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3272 (or 3256 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 33.

The square root of 421578240 is about 20532.3705401982. The cubic root of 421578240 is about 749.8241009715.

The spelling of 421578240 in words is "four hundred twenty-one million, five hundred seventy-eight thousand, two hundred forty".