423335781 has 32 divisors (see below), whose sum is σ = 685808640. Its totient is φ = 255956400.

The previous prime is 423335777. The next prime is 423335813. The reversal of 423335781 is 187533324.

It is not a de Polignac number, because 423335781 - 2² = 423335777 is a prime.

It is a super-2 number, since 2×423335781² = 358426366949759922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423335711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 144376 + ... + 147278.

It is an arithmetic number, because the mean of its divisors is an integer number (21431520).

Almost surely, 2^423335781 is an apocalyptic number.

It is an amenable number.

423335781 is a deficient number, since it is larger than the sum of its proper divisors (262472859).

423335781 is a wasteful number, since it uses less digits than its factorization.

423335781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3414 (or 3408 counting only the distinct ones).

The product of its digits is 60480, while the sum is 36.

The square root of 423335781 is about 20575.1252973099. The cubic root of 423335781 is about 750.8646507889.

The spelling of 423335781 in words is "four hundred twenty-three million, three hundred thirty-five thousand, seven hundred eighty-one".