429216646 has 32 divisors (see below), whose sum is σ = 707343840. Its totient is φ = 194428416.

The previous prime is 429216551. The next prime is 429216647. The reversal of 429216646 is 646612924.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 429216599 and 429216608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (429216647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 633660 + ... + 634336.

It is an arithmetic number, because the mean of its divisors is an integer number (22104495).

Almost surely, 2^429216646 is an apocalyptic number.

429216646 is a deficient number, since it is larger than the sum of its proper divisors (278127194).

429216646 is a wasteful number, since it uses less digits than its factorization.

429216646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1368.

The product of its digits is 124416, while the sum is 40.

The square root of 429216646 is about 20717.5444008213. The cubic root of 429216646 is about 754.3256092148.

The spelling of 429216646 in words is "four hundred twenty-nine million, two hundred sixteen thousand, six hundred forty-six".