671388120 has 192 divisors, whose sum is σ = 2407860000. Its totient is φ = 161187840.

The previous prime is 671388083. The next prime is 671388121. The reversal of 671388120 is 21883176.

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 (671388121) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 190131 + ... + 193629.

Almost surely, 2^671388120 is an apocalyptic number.

671388120 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 671388120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1203930000).

671388120 is an abundant number, since it is smaller than the sum of its proper divisors (1736471880).

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

671388120 is a wasteful number, since it uses less digits than its factorization.

671388120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3570 (or 3563 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 671388120 is about 25911.1582141748. The cubic root of 671388120 is about 875.6379000097.

The spelling of 671388120 in words is "six hundred seventy-one million, three hundred eighty-eight thousand, one hundred twenty".