643272848 has 20 divisors (see below), whose sum is σ = 1248894768. Its totient is φ = 320977440.

The previous prime is 643272841. The next prime is 643272869. The reversal of 643272848 is 848272346.

It is a happy number.

It is a super-2 number, since 2×643272848² = 827599913948062208, which contains 22 as substring.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 643272799 and 643272808.

It is not an unprimeable number, because it can be changed into a prime (643272841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33086 + ... + 48797.

Almost surely, 2^643272848 is an apocalyptic number.

It is an amenable number.

643272848 is a deficient number, since it is larger than the sum of its proper divisors (605621920).

643272848 is a wasteful number, since it uses less digits than its factorization.

643272848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82382 (or 82376 counting only the distinct ones).

The product of its digits is 516096, while the sum is 44.

The square root of 643272848 is about 25362.8241329707. The cubic root of 643272848 is about 863.2403659858.

The spelling of 643272848 in words is "six hundred forty-three million, two hundred seventy-two thousand, eight hundred forty-eight".