1670740738 has 4 divisors (see below), whose sum is σ = 2506111110. Its totient is φ = 835370368.

The previous prime is 1670740727. The next prime is 1670740763. The reversal of 1670740738 is 8370470761.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1664068849 + 6671889 = 40793^2 + 2583^2 .

It is a super-2 number, since 2×1670740738² = 5582749227225569288, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1670740694 and 1670740703.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 417685183 + ... + 417685186.

Almost surely, 2^1670740738 is an apocalyptic number.

1670740738 is a deficient number, since it is larger than the sum of its proper divisors (835370372).

1670740738 is an equidigital number, since it uses as much as digits as its factorization.

1670740738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 835370371.

The product of its (nonzero) digits is 197568, while the sum is 43.

The square root of 1670740738 is about 40874.6955707318. The cubic root of 1670740738 is about 1186.5963845335.

The spelling of 1670740738 in words is "one billion, six hundred seventy million, seven hundred forty thousand, seven hundred thirty-eight".