420381647 has 8 divisors (see below), whose sum is σ = 481358976. Its totient is φ = 359635032.

The previous prime is 420381613. The next prime is 420381653. The reversal of 420381647 is 746183024.

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

It is a cyclic number.

It is not a de Polignac number, because 420381647 - 2¹⁴ = 420365263 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420381347) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53753 + ... + 61074.

It is an arithmetic number, because the mean of its divisors is an integer number (60169872).

Almost surely, 2^420381647 is an apocalyptic number.

420381647 is a deficient number, since it is larger than the sum of its proper divisors (60977329).

420381647 is a wasteful number, since it uses less digits than its factorization.

420381647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115357.

The product of its (nonzero) digits is 32256, while the sum is 35.

The square root of 420381647 is about 20503.2106510176. The cubic root of 420381647 is about 749.1140038339.

The spelling of 420381647 in words is "four hundred twenty million, three hundred eighty-one thousand, six hundred forty-seven".