672544438 has 8 divisors (see below), whose sum is σ = 1010001888. Its totient is φ = 335877144.

The previous prime is 672544421. The next prime is 672544471. The reversal of 672544438 is 834445276.

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

It is a junction number, because it is equal to n+sod(n) for n = 672544394 and 672544403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 195406 + ... + 198817.

It is an arithmetic number, because the mean of its divisors is an integer number (126250236).

Almost surely, 2^672544438 is an apocalyptic number.

672544438 is a deficient number, since it is larger than the sum of its proper divisors (337457450).

672544438 is a wasteful number, since it uses less digits than its factorization.

672544438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395078.

The product of its digits is 645120, while the sum is 43.

The square root of 672544438 is about 25933.4617434696. The cubic root of 672544438 is about 876.1403094270.

The spelling of 672544438 in words is "six hundred seventy-two million, five hundred forty-four thousand, four hundred thirty-eight".