421639430 has 8 divisors (see below), whose sum is σ = 758950992. Its totient is φ = 168655768.

The previous prime is 421639411. The next prime is 421639447. The reversal of 421639430 is 34936124.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21081962 + ... + 21081981.

It is an arithmetic number, because the mean of its divisors is an integer number (94868874).

Almost surely, 2^421639430 is an apocalyptic number.

421639430 is a deficient number, since it is larger than the sum of its proper divisors (337311562).

421639430 is a wasteful number, since it uses less digits than its factorization.

421639430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42163950.

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 421639430 is about 20533.8605722353. The cubic root of 421639430 is about 749.8603769718.

The spelling of 421639430 in words is "four hundred twenty-one million, six hundred thirty-nine thousand, four hundred thirty".