671687450 has 48 divisors (see below), whose sum is σ = 1443925440. Its totient is φ = 227694720.

The previous prime is 671687407. The next prime is 671687453. The reversal of 671687450 is 54786176.

It is not an unprimeable number, because it can be changed into a prime (671687453) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20369 + ... + 41931.

It is an arithmetic number, because the mean of its divisors is an integer number (30081780).

Almost surely, 2^671687450 is an apocalyptic number.

671687450 is an abundant number, since it is smaller than the sum of its proper divisors (772237990).

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

671687450 is a wasteful number, since it uses less digits than its factorization.

671687450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21671 (or 21666 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 44.

The square root of 671687450 is about 25916.9336535015. The cubic root of 671687450 is about 875.7680114125.

The spelling of 671687450 in words is "six hundred seventy-one million, six hundred eighty-seven thousand, four hundred fifty".