671403738 has 32 divisors (see below), whose sum is σ = 1358413056. Its totient is φ = 221211648.

The previous prime is 671403731. The next prime is 671403743. The reversal of 671403738 is 837304176.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 671403696 and 671403705.

It is not an unprimeable number, because it can be changed into a prime (671403731) 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, 292431 + ... + 294717.

It is an arithmetic number, because the mean of its divisors is an integer number (42450408).

Almost surely, 2^671403738 is an apocalyptic number.

671403738 is an abundant number, since it is smaller than the sum of its proper divisors (687009318).

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

671403738 is a wasteful number, since it uses less digits than its factorization.

671403738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2838.

The product of its (nonzero) digits is 84672, while the sum is 39.

The square root of 671403738 is about 25911.4595883752. The cubic root of 671403738 is about 875.6446897271.

The spelling of 671403738 in words is "six hundred seventy-one million, four hundred three thousand, seven hundred thirty-eight".