647432 has 8 divisors (see below), whose sum is σ = 1213950. Its totient is φ = 323712.

The previous prime is 647429. The next prime is 647441. The reversal of 647432 is 234746.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 498436 + 148996 = 706^2 + 386^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a d-powerful number, because it can be written as 6⁴ + 4⁷ + 4⁸ + 7 + 3¹² + 2¹⁵ .

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 647432.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40457 + ... + 40472.

2⁶⁴⁷⁴³² is an apocalyptic number.

It is an amenable number.

647432 is a deficient number, since it is larger than the sum of its proper divisors (566518).

647432 is a wasteful number, since it uses less digits than its factorization.

647432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80935 (or 80931 counting only the distinct ones).

The product of its digits is 4032, while the sum is 26.

The square root of 647432 is about 804.6315927181. The cubic root of 647432 is about 86.5096829460.

Subtracting from 647432 its reverse (234746), we obtain a triangular number (412686 = T₉₀₈).

The spelling of 647432 in words is "six hundred forty-seven thousand, four hundred thirty-two".