423604890 has 96 divisors (see below), whose sum is σ = 1166780160. Its totient is φ = 110528064.

The previous prime is 423604879. The next prime is 423604891. The reversal of 423604890 is 98406324.

It is a happy number.

423604890 is a `hidden beast` number, since 42 + 3 + 604 + 8 + 9 + 0 = 666.

It is a super-2 number, since 2×423604890² = 358882205663824200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (423604891) 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 47 ways as a sum of consecutive naturals, for example, 112356 + ... + 116064.

It is an arithmetic number, because the mean of its divisors is an integer number (12153960).

Almost surely, 2^423604890 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 423604890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (583390080).

423604890 is an abundant number, since it is smaller than the sum of its proper divisors (743175270).

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

423604890 is a wasteful number, since it uses less digits than its factorization.

423604890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3778 (or 3766 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 423604890 is about 20581.6639269035. The cubic root of 423604890 is about 751.0237220219.

The spelling of 423604890 in words is "four hundred twenty-three million, six hundred four thousand, eight hundred ninety".