674388188 has 6 divisors (see below), whose sum is σ = 1180179336. Its totient is φ = 337194092.

The previous prime is 674388173. The next prime is 674388199. The reversal of 674388188 is 881883476.

It is a happy number.

It is a super-2 number, since 2×674388188² = 909598856227846688, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 84298520 + ... + 84298527.

It is an arithmetic number, because the mean of its divisors is an integer number (196696556).

Almost surely, 2^674388188 is an apocalyptic number.

It is an amenable number.

674388188 is a deficient number, since it is larger than the sum of its proper divisors (505791148).

674388188 is a wasteful number, since it uses less digits than its factorization.

674388188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168597051 (or 168597049 counting only the distinct ones).

The product of its digits is 2064384, while the sum is 53.

The square root of 674388188 is about 25968.9851168658. The cubic root of 674388188 is about 876.9402118480.

The spelling of 674388188 in words is "six hundred seventy-four million, three hundred eighty-eight thousand, one hundred eighty-eight".