642308 has 12 divisors (see below), whose sum is σ = 1135680. Its totient is φ = 317832.

The previous prime is 642281. The next prime is 642359. The reversal of 642308 is 803246.

It is a happy number.

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, 368 + ... + 1191.

It is an arithmetic number, because the mean of its divisors is an integer number (94640).

2⁶⁴²³⁰⁸ is an apocalyptic number.

It is an amenable number.

642308 is a deficient number, since it is larger than the sum of its proper divisors (493372).

642308 is a wasteful number, since it uses less digits than its factorization.

642308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1666 (or 1664 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 642308 is about 801.4412018358. The cubic root of 642308 is about 86.2808557248.

The spelling of 642308 in words is "six hundred forty-two thousand, three hundred eight".