671548404 has 12 divisors (see below), whose sum is σ = 1566946304. Its totient is φ = 223849464.

The previous prime is 671548403. The next prime is 671548421. The reversal of 671548404 is 404845176.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671548403) 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, 27981172 + ... + 27981195.

Almost surely, 2^671548404 is an apocalyptic number.

It is an amenable number.

671548404 is an abundant number, since it is smaller than the sum of its proper divisors (895397900).

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

671548404 is a wasteful number, since it uses less digits than its factorization.

671548404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55962374 (or 55962372 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 39.

The square root of 671548404 is about 25914.2509828087. The cubic root of 671548404 is about 875.7075763383.

The spelling of 671548404 in words is "six hundred seventy-one million, five hundred forty-eight thousand, four hundred four".