674405680 has 80 divisors (see below), whose sum is σ = 1692954144. Its totient is φ = 248371200.

The previous prime is 674405647. The next prime is 674405689. The reversal of 674405680 is 86504476.

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

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (674405689) 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, 641155 + ... + 642205.

Almost surely, 2^674405680 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 674405680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (846477072).

674405680 is an abundant number, since it is smaller than the sum of its proper divisors (1018548464).

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

674405680 is a wasteful number, since it uses less digits than its factorization.

674405680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1694 (or 1688 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 40.

The square root of 674405680 is about 25969.3219010432. The cubic root of 674405680 is about 876.9477936858.

The spelling of 674405680 in words is "six hundred seventy-four million, four hundred five thousand, six hundred eighty".