6430738 has 4 divisors (see below), whose sum is σ = 9646110. Its totient is φ = 3215368.

The previous prime is 6430687. The next prime is 6430747. The reversal of 6430738 is 8370346.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8370346 = 2 ⋅4185173.

It can be written as a sum of positive squares in only one way, i.e., 5257849 + 1172889 = 2293^2 + 1083^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1607683 + ... + 1607686.

Almost surely, 2^6430738 is an apocalyptic number.

6430738 is a deficient number, since it is larger than the sum of its proper divisors (3215372).

6430738 is a wasteful number, since it uses less digits than its factorization.

6430738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3215371.

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 6430738 is about 2535.8899818407. The cubic root of 6430738 is about 185.9603144992.

The spelling of 6430738 in words is "six million, four hundred thirty thousand, seven hundred thirty-eight".