673278840 has 192 divisors, whose sum is σ = 2369334240. Its totient is φ = 164828160.

The previous prime is 673278803. The next prime is 673278847. The reversal of 673278840 is 48872376.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (673278847) 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 47 ways as a sum of consecutive naturals, for example, 1370995 + ... + 1371485.

Almost surely, 2^673278840 is an apocalyptic number.

673278840 is a gapful number since it is divisible by the number (60) 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 673278840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1184667120).

673278840 is an abundant number, since it is smaller than the sum of its proper divisors (1696055400).

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

673278840 is a wasteful number, since it uses less digits than its factorization.

673278840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 814 (or 807 counting only the distinct ones).

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

The square root of 673278840 is about 25947.6172316458. The cubic root of 673278840 is about 876.4591013137.

It can be divided in two parts, 67327 and 8840, that added together give a palindrome (76167).

The spelling of 673278840 in words is "six hundred seventy-three million, two hundred seventy-eight thousand, eight hundred forty".