423756641 has 24 divisors (see below), whose sum is σ = 533830080. Its totient is φ = 329266080.

The previous prime is 423756631. The next prime is 423756643. The reversal of 423756641 is 146657324.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-423756641 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 423756595 and 423756604.

It is not an unprimeable number, because it can be changed into a prime (423756643) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 573050 + ... + 573788.

It is an arithmetic number, because the mean of its divisors is an integer number (22242920).

Almost surely, 2^423756641 is an apocalyptic number.

It is an amenable number.

423756641 is a deficient number, since it is larger than the sum of its proper divisors (110073439).

423756641 is a wasteful number, since it uses less digits than its factorization.

423756641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1445 (or 1434 counting only the distinct ones).

The product of its digits is 120960, while the sum is 38.

The square root of 423756641 is about 20585.3501549039. The cubic root of 423756641 is about 751.1133928425.

The spelling of 423756641 in words is "four hundred twenty-three million, seven hundred fifty-six thousand, six hundred forty-one".