470438639 has 4 divisors (see below), whose sum is σ = 513205800. Its totient is φ = 427671480.

The previous prime is 470438629. The next prime is 470438641. The reversal of 470438639 is 936834074.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 470438639 - 2⁸ = 470438383 is a prime.

It is a super-3 number, since 3×470438639³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 470438639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (470438629) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21383564 + ... + 21383585.

It is an arithmetic number, because the mean of its divisors is an integer number (128301450).

Almost surely, 2^470438639 is an apocalyptic number.

470438639 is a deficient number, since it is larger than the sum of its proper divisors (42767161).

470438639 is a wasteful number, since it uses less digits than its factorization.

470438639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42767160.

The product of its (nonzero) digits is 435456, while the sum is 44.

The square root of 470438639 is about 21689.5974835865. The cubic root of 470438639 is about 777.7398075424.

The spelling of 470438639 in words is "four hundred seventy million, four hundred thirty-eight thousand, six hundred thirty-nine".