423647826 has 96 divisors (see below), whose sum is σ = 1046520000. Its totient is φ = 113678208.

The previous prime is 423647813. The next prime is 423647827. The reversal of 423647826 is 628746324.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (423647827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 832060 + ... + 832568.

It is an arithmetic number, because the mean of its divisors is an integer number (10901250).

Almost surely, 2^423647826 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 423647826, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (523260000).

423647826 is an abundant number, since it is smaller than the sum of its proper divisors (622872174).

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

423647826 is a wasteful number, since it uses less digits than its factorization.

423647826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 696 (or 689 counting only the distinct ones).

The product of its digits is 387072, while the sum is 42.

The square root of 423647826 is about 20582.7069648285. The cubic root of 423647826 is about 751.0490954031.

The spelling of 423647826 in words is "four hundred twenty-three million, six hundred forty-seven thousand, eight hundred twenty-six".