6430234640 has 20 divisors (see below), whose sum is σ = 14950295724. Its totient is φ = 2572093824.

The previous prime is 6430234627. The next prime is 6430234673. The reversal of 6430234640 is 464320346.

It can be written as a sum of positive squares in 2 ways, for example, as 899040256 + 5531194384 = 29984^2 + 74372^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 6430234597 and 6430234606.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40188887 + ... + 40189046.

Almost surely, 2^6430234640 is an apocalyptic number.

It is an amenable number.

6430234640 is an abundant number, since it is smaller than the sum of its proper divisors (8520061084).

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

6430234640 is a wasteful number, since it uses less digits than its factorization.

6430234640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80377946 (or 80377940 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 32.

The square root of 6430234640 is about 80188.7438484978. The cubic root of 6430234640 is about 1859.5546241609.

Adding to 6430234640 its reverse (464320346), we get a palindrome (6894554986).

The spelling of 6430234640 in words is "six billion, four hundred thirty million, two hundred thirty-four thousand, six hundred forty".