674960640 has 144 divisors (see below), whose sum is σ = 2173082688. Its totient is φ = 178536448.

The previous prime is 674960621. The next prime is 674960641. The reversal of 674960640 is 46069476.

It is a junction number, because it is equal to n+sod(n) for n = 674960592 and 674960601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (674960641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 525439 + ... + 526721.

It is an arithmetic number, because the mean of its divisors is an integer number (15090852).

Almost surely, 2^674960640 is an apocalyptic number.

674960640 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 674960640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1086541344).

674960640 is an abundant number, since it is smaller than the sum of its proper divisors (1498122048).

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

674960640 is a wasteful number, since it uses less digits than its factorization.

674960640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1444 (or 1430 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 42.

The square root of 674960640 is about 25980.0046189372. The cubic root of 674960640 is about 877.1882708601.

The spelling of 674960640 in words is "six hundred seventy-four million, nine hundred sixty thousand, six hundred forty".