671612928 has 160 divisors (see below), whose sum is σ = 2080372800. Its totient is φ = 188743680.

The previous prime is 671612917. The next prime is 671612941. The reversal of 671612928 is 829216176.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 671612928.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (3) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11010018 + ... + 11010078.

It is an arithmetic number, because the mean of its divisors is an integer number (13002330).

Almost surely, 2^671612928 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 671612928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1040186400).

671612928 is an abundant number, since it is smaller than the sum of its proper divisors (1408759872).

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

671612928 is an frugal number, since it uses more digits than its factorization.

671612928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109 (or 73 counting only the distinct ones).

The product of its digits is 72576, while the sum is 42.

The square root of 671612928 is about 25915.4959049600. The cubic root of 671612928 is about 875.7356221430.

The spelling of 671612928 in words is "six hundred seventy-one million, six hundred twelve thousand, nine hundred twenty-eight".