423402588 has 144 divisors (see below), whose sum is σ = 1279789056. Its totient is φ = 115482240.

The previous prime is 423402587. The next prime is 423402659. The reversal of 423402588 is 885204324.

423402588 is a `hidden beast` number, since 42 + 34 + 0 + 2 + 588 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423402583) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 648070 + ... + 648722.

It is an arithmetic number, because the mean of its divisors is an integer number (8887424).

Almost surely, 2^423402588 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 423402588, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (639894528).

423402588 is an abundant number, since it is smaller than the sum of its proper divisors (856386468).

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

423402588 is a wasteful number, since it uses less digits than its factorization.

423402588 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 784 (or 779 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 36.

The square root of 423402588 is about 20576.7487227696. The cubic root of 423402588 is about 750.9041469198.

The spelling of 423402588 in words is "four hundred twenty-three million, four hundred two thousand, five hundred eighty-eight".