421340305440 has 96 divisors (see below), whose sum is σ = 1329326280576. Its totient is φ = 112179271680.

The previous prime is 421340305439. The next prime is 421340305471. The reversal of 421340305440 is 44503043124.

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

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 421340305398 and 421340305407.

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, 392677 + ... + 998436.

It is an arithmetic number, because the mean of its divisors is an integer number (13847148756).

Almost surely, 2^421340305440 is an apocalyptic number.

421340305440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

421340305440 is an abundant number, since it is smaller than the sum of its proper divisors (907985975136).

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

421340305440 is a wasteful number, since it uses less digits than its factorization.

421340305440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1391762 (or 1391754 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 30.

Adding to 421340305440 its reverse (44503043124), we get a palindrome (465843348564).

The spelling of 421340305440 in words is "four hundred twenty-one billion, three hundred forty million, three hundred five thousand, four hundred forty".