429989818 has 4 divisors (see below), whose sum is σ = 644984730. Its totient is φ = 214994908.

The previous prime is 429989801. The next prime is 429989821. The reversal of 429989818 is 818989924.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 424895769 + 5094049 = 20613^2 + 2257^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107497453 + ... + 107497456.

Almost surely, 2^429989818 is an apocalyptic number.

429989818 is a deficient number, since it is larger than the sum of its proper divisors (214994912).

429989818 is a wasteful number, since it uses less digits than its factorization.

429989818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214994911.

The product of its digits is 2985984, while the sum is 58.

The square root of 429989818 is about 20736.1958420536. The cubic root of 429989818 is about 754.7782738522.

The spelling of 429989818 in words is "four hundred twenty-nine million, nine hundred eighty-nine thousand, eight hundred eighteen".