429521646 has 16 divisors (see below), whose sum is σ = 875252304. Its totient is φ = 140472384.

The previous prime is 429521633. The next prime is 429521663. The reversal of 429521646 is 646125924.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 675031 + ... + 675666.

It is an arithmetic number, because the mean of its divisors is an integer number (54703269).

Almost surely, 2^429521646 is an apocalyptic number.

429521646 is an abundant number, since it is smaller than the sum of its proper divisors (445730658).

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

429521646 is a wasteful number, since it uses less digits than its factorization.

429521646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1350755.

The product of its digits is 103680, while the sum is 39.

The square root of 429521646 is about 20724.9040046028. The cubic root of 429521646 is about 754.5042407124.

The spelling of 429521646 in words is "four hundred twenty-nine million, five hundred twenty-one thousand, six hundred forty-six".