672308505 has 80 divisors (see below), whose sum is σ = 1322481600. Its totient is φ = 324051840.

The previous prime is 672308477. The next prime is 672308509. The reversal of 672308505 is 505803276.

It is not a de Polignac number, because 672308505 - 2¹⁰ = 672307481 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 672308505.

It is not an unprimeable number, because it can be changed into a prime (672308509) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1019866 + ... + 1020524.

It is an arithmetic number, because the mean of its divisors is an integer number (16531020).

Almost surely, 2^672308505 is an apocalyptic number.

It is an amenable number.

672308505 is a deficient number, since it is larger than the sum of its proper divisors (650173095).

672308505 is a wasteful number, since it uses less digits than its factorization.

672308505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 916 (or 907 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 672308505 is about 25928.9125302239. The cubic root of 672308505 is about 876.0378455220.

The spelling of 672308505 in words is "six hundred seventy-two million, three hundred eight thousand, five hundred five".