671144292 has 360 divisors, whose sum is σ = 2321294976. Its totient is φ = 164975616.

The previous prime is 671144273. The next prime is 671144297. The reversal of 671144292 is 292441176.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671144297) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 6515913 + ... + 6516015.

Almost surely, 2^671144292 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 671144292, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1160647488).

671144292 is an abundant number, since it is smaller than the sum of its proper divisors (1650150684).

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

671144292 is a wasteful number, since it uses less digits than its factorization.

671144292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169 (or 145 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 671144292 is about 25906.4527097015. The cubic root of 671144292 is about 875.5318853798.

The spelling of 671144292 in words is "six hundred seventy-one million, one hundred forty-four thousand, two hundred ninety-two".