673866648 has 128 divisors (see below), whose sum is σ = 2303884800. Its totient is φ = 177717888.

The previous prime is 673866619. The next prime is 673866653. The reversal of 673866648 is 846668376.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 673866594 and 673866603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2515 + ... + 36797.

It is an arithmetic number, because the mean of its divisors is an integer number (17999100).

Almost surely, 2^673866648 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 673866648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1151942400).

673866648 is an abundant number, since it is smaller than the sum of its proper divisors (1630018152).

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

673866648 is a wasteful number, since it uses less digits than its factorization.

673866648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34318 (or 34308 counting only the distinct ones).

The product of its digits is 6967296, while the sum is 54.

The square root of 673866648 is about 25958.9415808888. The cubic root of 673866648 is about 876.7140921557.

The spelling of 673866648 in words is "six hundred seventy-three million, eight hundred sixty-six thousand, six hundred forty-eight".