643231260 has 96 divisors (see below), whose sum is σ = 2287057920. Its totient is φ = 147023424.

The previous prime is 643231243. The next prime is 643231283. The reversal of 643231260 is 62132346.

643231260 is a `hidden beast` number, since 643 + 2 + 3 + 12 + 6 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 81304 + ... + 88863.

It is an arithmetic number, because the mean of its divisors is an integer number (23823520).

Almost surely, 2^643231260 is an apocalyptic number.

643231260 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

643231260 is an abundant number, since it is smaller than the sum of its proper divisors (1643826660).

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

643231260 is a wasteful number, since it uses less digits than its factorization.

643231260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170192 (or 170184 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 643231260 is about 25362.0042583389. The cubic root of 643231260 is about 863.2217625714.

The spelling of 643231260 in words is "six hundred forty-three million, two hundred thirty-one thousand, two hundred sixty".