429978 has 8 divisors (see below), whose sum is σ = 859968. Its totient is φ = 143324.

The previous prime is 429973. The next prime is 429991. The reversal of 429978 is 879924.

It is a sphenic number, since it is the product of 3 distinct primes.

429978 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (429971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35826 + ... + 35837.

It is an arithmetic number, because the mean of its divisors is an integer number (107496).

2⁴²⁹⁹⁷⁸ is an apocalyptic number.

429978 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

429978 is a wasteful number, since it uses less digits than its factorization.

429978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71668.

The product of its digits is 36288, while the sum is 39.

The square root of 429978 is about 655.7270773729. The cubic root of 429978 is about 75.4771358920.

The spelling of 429978 in words is "four hundred twenty-nine thousand, nine hundred seventy-eight".