671542960 has 80 divisors (see below), whose sum is σ = 1777386240. Its totient is φ = 233573120.

The previous prime is 671542951. The next prime is 671542967. The reversal of 671542960 is 69245176.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (671542967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3651 + ... + 36829.

It is an arithmetic number, because the mean of its divisors is an integer number (22217328).

Almost surely, 2^671542960 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 671542960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (888693120).

671542960 is an abundant number, since it is smaller than the sum of its proper divisors (1105843280).

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

671542960 is a wasteful number, since it uses less digits than its factorization.

671542960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33226 (or 33220 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 671542960 is about 25914.1459438663. The cubic root of 671542960 is about 875.7052099837.

The spelling of 671542960 in words is "six hundred seventy-one million, five hundred forty-two thousand, nine hundred sixty".