643462 has 8 divisors (see below), whose sum is σ = 970776. Its totient is φ = 319872.

The previous prime is 643457. The next prime is 643463. The reversal of 643462 is 264346.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643463) 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, 448 + ... + 1219.

It is an arithmetic number, because the mean of its divisors is an integer number (121347).

2⁶⁴³⁴⁶² is an apocalyptic number.

643462 is a deficient number, since it is larger than the sum of its proper divisors (327314).

643462 is a wasteful number, since it uses less digits than its factorization.

643462 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1862.

The product of its digits is 3456, while the sum is 25.

The square root of 643462 is about 802.1608317538. The cubic root of 643462 is about 86.3324968572.

The spelling of 643462 in words is "six hundred forty-three thousand, four hundred sixty-two".