429640 has 32 divisors (see below), whose sum is σ = 1010880. Its totient is φ = 164032.

The previous prime is 429631. The next prime is 429643. The reversal of 429640 is 46924.

It is not an unprimeable number, because it can be changed into a prime (429643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 687 + ... + 1153.

It is an arithmetic number, because the mean of its divisors is an integer number (31590).

2⁴²⁹⁶⁴⁰ is an apocalyptic number.

429640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 429640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (505440).

429640 is an abundant number, since it is smaller than the sum of its proper divisors (581240).

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

429640 is a wasteful number, since it uses less digits than its factorization.

429640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501 (or 497 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 429640 is about 655.4692975266. The cubic root of 429640 is about 75.4573535159.

The spelling of 429640 in words is "four hundred twenty-nine thousand, six hundred forty".