671903238 has 32 divisors (see below), whose sum is σ = 1394491392. Its totient is φ = 215596800.

The previous prime is 671903231. The next prime is 671903261. The reversal of 671903238 is 832309176.

It is a super-2 number, since 2×671903238² = 902907922469769288, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 671903196 and 671903205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671903231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26070 + ... + 44982.

It is an arithmetic number, because the mean of its divisors is an integer number (43577856).

Almost surely, 2^671903238 is an apocalyptic number.

671903238 is an abundant number, since it is smaller than the sum of its proper divisors (722588154).

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

671903238 is a wasteful number, since it uses less digits than its factorization.

671903238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19140.

The product of its (nonzero) digits is 54432, while the sum is 39.

The square root of 671903238 is about 25921.0963888490. The cubic root of 671903238 is about 875.8617851827.

The spelling of 671903238 in words is "six hundred seventy-one million, nine hundred three thousand, two hundred thirty-eight".