672385805 has 16 divisors (see below), whose sum is σ = 993062784. Its totient is φ = 425597760.

The previous prime is 672385783. The next prime is 672385817. The reversal of 672385805 is 508583276.

It is not a de Polignac number, because 672385805 - 2¹⁰ = 672384781 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 738431 + ... + 739340.

It is an arithmetic number, because the mean of its divisors is an integer number (62066424).

Almost surely, 2^672385805 is an apocalyptic number.

672385805 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

672385805 is a deficient number, since it is larger than the sum of its proper divisors (320676979).

672385805 is a wasteful number, since it uses less digits than its factorization.

672385805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1477796.

The product of its (nonzero) digits is 403200, while the sum is 44.

The square root of 672385805 is about 25930.4031013789. The cubic root of 672385805 is about 876.0714189633.

The spelling of 672385805 in words is "six hundred seventy-two million, three hundred eighty-five thousand, eight hundred five".