421646468 has 6 divisors (see below), whose sum is σ = 737881326. Its totient is φ = 210823232.

The previous prime is 421646437. The next prime is 421646473. The reversal of 421646468 is 864646124.

It can be written as a sum of positive squares in only one way, i.e., 389746564 + 31899904 = 19742^2 + 5648^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52705805 + ... + 52705812.

It is an arithmetic number, because the mean of its divisors is an integer number (122980221).

Almost surely, 2^421646468 is an apocalyptic number.

It is an amenable number.

421646468 is a deficient number, since it is larger than the sum of its proper divisors (316234858).

421646468 is a wasteful number, since it uses less digits than its factorization.

421646468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105411621 (or 105411619 counting only the distinct ones).

The product of its digits is 221184, while the sum is 41.

The square root of 421646468 is about 20534.0319469899. The cubic root of 421646468 is about 749.8645491685.

The spelling of 421646468 in words is "four hundred twenty-one million, six hundred forty-six thousand, four hundred sixty-eight".