672236928 has 128 divisors (see below), whose sum is σ = 2164521600. Its totient is φ = 203696640.

The previous prime is 672236923. The next prime is 672236947. The reversal of 672236928 is 829632276.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (672236923) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29175 + ... + 46857.

It is an arithmetic number, because the mean of its divisors is an integer number (16910325).

Almost surely, 2^672236928 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 672236928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1082260800).

672236928 is an abundant number, since it is smaller than the sum of its proper divisors (1492284672).

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

672236928 is a wasteful number, since it uses less digits than its factorization.

672236928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17717 (or 17699 counting only the distinct ones).

The product of its digits is 435456, while the sum is 45.

The square root of 672236928 is about 25927.5322389154. The cubic root of 672236928 is about 876.0067554367.

The spelling of 672236928 in words is "six hundred seventy-two million, two hundred thirty-six thousand, nine hundred twenty-eight".