671494824 has 360 divisors, whose sum is σ = 2506099050. Its totient is φ = 160997760.

The previous prime is 671494823. The next prime is 671494841. The reversal of 671494824 is 428494176.

It can be written as a sum of positive squares in only one way, i.e., 645668100 + 25826724 = 25410^2 + 5082^2 .

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

Its product of digits (387072) is a multiple of the sum of its prime divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 671494824.

It is not an unprimeable number, because it can be changed into a prime (671494823) by changing a digit.

It is a polite number, since it can be written in 89 ways as a sum of consecutive naturals, for example, 51653442 + ... + 51653454.

Almost surely, 2^671494824 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 671494824, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1253049525).

671494824 is an abundant number, since it is smaller than the sum of its proper divisors (1834604226).

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

671494824 is a wasteful number, since it uses less digits than its factorization.

671494824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83 (or 36 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The square root of 671494824 is about 25913.2171680785. The cubic root of 671494824 is about 875.6842860539.

The spelling of 671494824 in words is "six hundred seventy-one million, four hundred ninety-four thousand, eight hundred twenty-four".