672808734 has 128 divisors (see below), whose sum is σ = 1720588800. Its totient is φ = 193155840.

The previous prime is 672808727. The next prime is 672808739. The reversal of 672808734 is 437808276.

It is a happy number.

672808734 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 672808734.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (672808739) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 973329 + ... + 974019.

It is an arithmetic number, because the mean of its divisors is an integer number (13442100).

Almost surely, 2^672808734 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 672808734, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (860294400).

672808734 is an abundant number, since it is smaller than the sum of its proper divisors (1047780066).

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

672808734 is a wasteful number, since it uses less digits than its factorization.

672808734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 807 (or 801 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 45.

The square root of 672808734 is about 25938.5568989487. The cubic root of 672808734 is about 876.2550627131.

The spelling of 672808734 in words is "six hundred seventy-two million, eight hundred eight thousand, seven hundred thirty-four".