672595640 has 16 divisors (see below), whose sum is σ = 1513340280. Its totient is φ = 269038240.

The previous prime is 672595621. The next prime is 672595661. The reversal of 672595640 is 46595276.

It is a junction number, because it is equal to n+sod(n) for n = 672595591 and 672595600.

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, 8407406 + ... + 8407485.

Almost surely, 2^672595640 is an apocalyptic number.

It is an amenable number.

672595640 is an abundant number, since it is smaller than the sum of its proper divisors (840744640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

672595640 is a wasteful number, since it uses less digits than its factorization.

672595640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16814902 (or 16814898 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 44.

The square root of 672595640 is about 25934.4489048832. The cubic root of 672595640 is about 876.1625429009.

The spelling of 672595640 in words is "six hundred seventy-two million, five hundred ninety-five thousand, six hundred forty".