671211398 has 32 divisors (see below), whose sum is σ = 1205178912. Its totient is φ = 276307200.

The previous prime is 671211397. The next prime is 671211403. The reversal of 671211398 is 893112176.

It is a super-2 number, since 2×671211398² = 901049481610228808, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671211397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6983 + ... + 37298.

It is an arithmetic number, because the mean of its divisors is an integer number (37661841).

Almost surely, 2^671211398 is an apocalyptic number.

671211398 is a deficient number, since it is larger than the sum of its proper divisors (533967514).

671211398 is a wasteful number, since it uses less digits than its factorization.

671211398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44360.

The product of its digits is 18144, while the sum is 38.

The square root of 671211398 is about 25907.7478372783. The cubic root of 671211398 is about 875.5610651380.

The spelling of 671211398 in words is "six hundred seventy-one million, two hundred eleven thousand, three hundred ninety-eight".