673052640 has 144 divisors (see below), whose sum is σ = 2296023408. Its totient is φ = 165654528.

The previous prime is 673052609. The next prime is 673052647. The reversal of 673052640 is 46250376.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (673052647) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 76972 + ... + 85268.

It is an arithmetic number, because the mean of its divisors is an integer number (15944607).

Almost surely, 2^673052640 is an apocalyptic number.

673052640 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 673052640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1148011704).

673052640 is an abundant number, since it is smaller than the sum of its proper divisors (1622970768).

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

673052640 is a wasteful number, since it uses less digits than its factorization.

673052640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8341 (or 8320 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 33.

The square root of 673052640 is about 25943.2580837488. The cubic root of 673052640 is about 876.3609363121.

The spelling of 673052640 in words is "six hundred seventy-three million, fifty-two thousand, six hundred forty".