642710270 has 8 divisors (see below), whose sum is σ = 1156878504. Its totient is φ = 257084104.

The previous prime is 642710261. The next prime is 642710273. The reversal of 642710270 is 72017246.

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 (642710273) 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, 32135504 + ... + 32135523.

It is an arithmetic number, because the mean of its divisors is an integer number (144609813).

Almost surely, 2^642710270 is an apocalyptic number.

642710270 is a deficient number, since it is larger than the sum of its proper divisors (514168234).

642710270 is a wasteful number, since it uses less digits than its factorization.

642710270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64271034.

The product of its (nonzero) digits is 4704, while the sum is 29.

The square root of 642710270 is about 25351.7311046011. The cubic root of 642710270 is about 862.9886419664.

The spelling of 642710270 in words is "six hundred forty-two million, seven hundred ten thousand, two hundred seventy".