673387440 has 80 divisors (see below), whose sum is σ = 2277282816. Its totient is φ = 163244800.

The previous prime is 673387411. The next prime is 673387441. The reversal of 673387440 is 44783376.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 673387392 and 673387401.

It is not an unprimeable number, because it can be changed into a prime (673387441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 124896 + ... + 130175.

Almost surely, 2^673387440 is an apocalyptic number.

673387440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

673387440 is an abundant number, since it is smaller than the sum of its proper divisors (1603895376).

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

673387440 is a wasteful number, since it uses less digits than its factorization.

673387440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255098 (or 255092 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 42.

The square root of 673387440 is about 25949.7098249672. The cubic root of 673387440 is about 876.5062231180.

The spelling of 673387440 in words is "six hundred seventy-three million, three hundred eighty-seven thousand, four hundred forty".