671704380 has 192 divisors, whose sum is σ = 2201472000. Its totient is φ = 169779456.

The previous prime is 671704361. The next prime is 671704387. The reversal of 671704380 is 83407176.

It is a super-2 number, since 2×671704380² = 902373548222368800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671704387) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 923577 + ... + 924303.

It is an arithmetic number, because the mean of its divisors is an integer number (11466000).

Almost surely, 2^671704380 is an apocalyptic number.

671704380 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 671704380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1100736000).

671704380 is an abundant number, since it is smaller than the sum of its proper divisors (1529767620).

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

671704380 is a wasteful number, since it uses less digits than its factorization.

671704380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 833 (or 825 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 671704380 is about 25917.2602718729. The cubic root of 671704380 is about 875.7753693128.

The spelling of 671704380 in words is "six hundred seventy-one million, seven hundred four thousand, three hundred eighty".