671139240 has 32 divisors (see below), whose sum is σ = 2013418080. Its totient is φ = 178970432.

The previous prime is 671139233. The next prime is 671139289. The reversal of 671139240 is 42931176.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2796294 + ... + 2796533.

It is an arithmetic number, because the mean of its divisors is an integer number (62919315).

Almost surely, 2^671139240 is an apocalyptic number.

671139240 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

671139240 is an abundant number, since it is smaller than the sum of its proper divisors (1342278840).

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

671139240 is a wasteful number, since it uses less digits than its factorization.

671139240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5592841 (or 5592837 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 671139240 is about 25906.3552048527. The cubic root of 671139240 is about 875.5296885356.

The spelling of 671139240 in words is "six hundred seventy-one million, one hundred thirty-nine thousand, two hundred forty".