421437040 has 40 divisors (see below), whose sum is σ = 981276480. Its totient is φ = 168327936.

The previous prime is 421437031. The next prime is 421437047. The reversal of 421437040 is 40734124.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 421436996 and 421437014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421437047) 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, 57081 + ... + 64039.

It is an arithmetic number, because the mean of its divisors is an integer number (24531912).

Almost surely, 2^421437040 is an apocalyptic number.

421437040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

421437040 is an abundant number, since it is smaller than the sum of its proper divisors (559839440).

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

421437040 is a wasteful number, since it uses less digits than its factorization.

421437040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7729 (or 7723 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 421437040 is about 20528.9317793206. The cubic root of 421437040 is about 749.7403782873.

The spelling of 421437040 in words is "four hundred twenty-one million, four hundred thirty-seven thousand, forty".