671854484 has 108 divisors (see below), whose sum is σ = 1506663900. Its totient is φ = 261015552.

The previous prime is 671854481. The next prime is 671854487. The reversal of 671854484 is 484458176.

It is an interprime number because it is at equal distance from previous prime (671854481) and next prime (671854487).

It can be written as a sum of positive squares in 6 ways, for example, as 184416400 + 487438084 = 13580^2 + 22078^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671854481) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1642472 + ... + 1642880.

Almost surely, 2^671854484 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 671854484, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (753331950).

671854484 is an abundant number, since it is smaller than the sum of its proper divisors (834809416).

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

671854484 is a wasteful number, since it uses less digits than its factorization.

671854484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490 (or 464 counting only the distinct ones).

The product of its digits is 860160, while the sum is 47.

The square root of 671854484 is about 25920.1559408889. The cubic root of 671854484 is about 875.8406001886.

The spelling of 671854484 in words is "six hundred seventy-one million, eight hundred fifty-four thousand, four hundred eighty-four".