438646947 has 8 divisors (see below), whose sum is σ = 592266240. Its totient is φ = 288729480.

The previous prime is 438646933. The next prime is 438646963. The reversal of 438646947 is 749646834.

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

It is not a de Polignac number, because 438646947 - 2¹⁵ = 438614179 is a prime.

It is a super-2 number, since 2×438646947² = 384822288224841618, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 438646947.

It is not an unprimeable number, because it can be changed into a prime (438646907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 925179 + ... + 925652.

It is an arithmetic number, because the mean of its divisors is an integer number (74033280).

Almost surely, 2^438646947 is an apocalyptic number.

438646947 is a deficient number, since it is larger than the sum of its proper divisors (153619293).

438646947 is a wasteful number, since it uses less digits than its factorization.

438646947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1850913.

The product of its digits is 3483648, while the sum is 51.

The square root of 438646947 is about 20943.8999949866. The cubic root of 438646947 is about 759.8100558329.

The spelling of 438646947 in words is "four hundred thirty-eight million, six hundred forty-six thousand, nine hundred forty-seven".