671838948 has 90 divisors (see below), whose sum is σ = 1930612838. Its totient is φ = 203575680.

The previous prime is 671838931. The next prime is 671839033. The reversal of 671838948 is 849838176.

It can be written as a sum of positive squares in only one way, i.e., 361304064 + 310534884 = 19008^2 + 17622^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 671838894 and 671838903.

It is an unprimeable number.

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 29 ways as a sum of consecutive naturals, for example, 30636 + ... + 47772.

Almost surely, 2^671838948 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 671838948, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (965306419).

671838948 is an abundant number, since it is smaller than the sum of its proper divisors (1258773890).

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

671838948 is a wasteful number, since it uses less digits than its factorization.

671838948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17175 (or 17153 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 54.

The square root of 671838948 is about 25919.8562496014. The cubic root of 671838948 is about 875.8338491412.

The spelling of 671838948 in words is "six hundred seventy-one million, eight hundred thirty-eight thousand, nine hundred forty-eight".