671238580 has 12 divisors (see below), whose sum is σ = 1409601060. Its totient is φ = 268495424.

The previous prime is 671238569. The next prime is 671238583. The reversal of 671238580 is 85832176.

It can be written as a sum of positive squares in 2 ways, for example, as 117765904 + 553472676 = 10852^2 + 23526^2 .

It is a super-2 number, since 2×671238580² = 901122462560832800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671238583) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16780945 + ... + 16780984.

It is an arithmetic number, because the mean of its divisors is an integer number (117466755).

Almost surely, 2^671238580 is an apocalyptic number.

It is an amenable number.

671238580 is an abundant number, since it is smaller than the sum of its proper divisors (738362480).

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

671238580 is a wasteful number, since it uses less digits than its factorization.

671238580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33561938 (or 33561936 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 40.

The square root of 671238580 is about 25908.2724240734. The cubic root of 671238580 is about 875.5728841564.

The spelling of 671238580 in words is "six hundred seventy-one million, two hundred thirty-eight thousand, five hundred eighty".