671080400 has 60 divisors (see below), whose sum is σ = 1614952812. Its totient is φ = 267985920.

The previous prime is 671080393. The next prime is 671080411. The reversal of 671080400 is 4080176.

It can be written as a sum of positive squares in 6 ways, for example, as 42876304 + 628204096 = 6548^2 + 25064^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 671080400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 349844 + ... + 351756.

Almost surely, 2^671080400 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 671080400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (807476406).

671080400 is an abundant number, since it is smaller than the sum of its proper divisors (943872412).

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

671080400 is a wasteful number, since it uses less digits than its factorization.

671080400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2808 (or 2797 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 671080400 is about 25905.2195512796. The cubic root of 671080400 is about 875.5041013602.

The spelling of 671080400 in words is "six hundred seventy-one million, eighty thousand, four hundred".