421797644 has 24 divisors (see below), whose sum is σ = 810781440. Its totient is φ = 191111184.

The previous prime is 421797641. The next prime is 421797653. The reversal of 421797644 is 446797124.

It is a junction number, because it is equal to n+sod(n) for n = 421797595 and 421797604.

It is not an unprimeable number, because it can be changed into a prime (421797641) 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, 118904 + ... + 122399.

It is an arithmetic number, because the mean of its divisors is an integer number (33782560).

Almost surely, 2^421797644 is an apocalyptic number.

It is an amenable number.

421797644 is a deficient number, since it is larger than the sum of its proper divisors (388983796).

421797644 is a wasteful number, since it uses less digits than its factorization.

421797644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241349 (or 241347 counting only the distinct ones).

The product of its digits is 338688, while the sum is 44.

The square root of 421797644 is about 20537.7127256177. The cubic root of 421797644 is about 749.9541566053.

The spelling of 421797644 in words is "four hundred twenty-one million, seven hundred ninety-seven thousand, six hundred forty-four".