672917256 has 384 divisors, whose sum is σ = 2292675840. Its totient is φ = 175718400.

The previous prime is 672917251. The next prime is 672917269. The reversal of 672917256 is 652719276.

It is not an unprimeable number, because it can be changed into a prime (672917251) by changing a digit.

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 95 ways as a sum of consecutive naturals, for example, 12696526 + ... + 12696578.

It is an arithmetic number, because the mean of its divisors is an integer number (5970510).

Almost surely, 2^672917256 is an apocalyptic number.

672917256 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 672917256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1146337920).

672917256 is an abundant number, since it is smaller than the sum of its proper divisors (1619758584).

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

672917256 is a wasteful number, since it uses less digits than its factorization.

672917256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157 (or 150 counting only the distinct ones).

The product of its digits is 317520, while the sum is 45.

The square root of 672917256 is about 25940.6487197217. The cubic root of 672917256 is about 876.3021726048.

It can be divided in two parts, 67291 and 7256, that added together give a palindrome (74547).

The spelling of 672917256 in words is "six hundred seventy-two million, nine hundred seventeen thousand, two hundred fifty-six".