671624 has 16 divisors (see below), whose sum is σ = 1293900. Its totient is φ = 326592.

The previous prime is 671609. The next prime is 671633. The reversal of 671624 is 426176.

671624 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 669124 + 2500 = 818^2 + 50^2 .

It is a junction number, because it is equal to n+sod(n) for n = 671593 and 671602.

It is an unprimeable number.

671624 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 839 + ... + 1430.

2⁶⁷¹⁶²⁴ is an apocalyptic number.

It is an amenable number.

671624 is a deficient number, since it is larger than the sum of its proper divisors (622276).

671624 is a wasteful number, since it uses less digits than its factorization.

671624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2312 (or 2308 counting only the distinct ones).

The product of its digits is 2016, while the sum is 26.

The square root of 671624 is about 819.5266926708. The cubic root of 671624 is about 87.5740434484.

The spelling of 671624 in words is "six hundred seventy-one thousand, six hundred twenty-four".