642308270 has 8 divisors (see below), whose sum is σ = 1156154904. Its totient is φ = 256923304.

The previous prime is 642308257. The next prime is 642308273. The reversal of 642308270 is 72803246.

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

It is a super-3 number, since 3×642308270³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642308273) 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, 32115404 + ... + 32115423.

It is an arithmetic number, because the mean of its divisors is an integer number (144519363).

Almost surely, 2^642308270 is an apocalyptic number.

642308270 is a deficient number, since it is larger than the sum of its proper divisors (513846634).

642308270 is a wasteful number, since it uses less digits than its factorization.

642308270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64230834.

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 642308270 is about 25343.8014117851. The cubic root of 642308270 is about 862.8086781445.

The spelling of 642308270 in words is "six hundred forty-two million, three hundred eight thousand, two hundred seventy".