642219270 has 64 divisors (see below), whose sum is σ = 1921660416. Its totient is φ = 133447680.

The previous prime is 642219257. The next prime is 642219289. The reversal of 642219270 is 72912246.

642219270 is digitally balanced in base 2 and base 6, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (33).

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, 136699 + ... + 141318.

It is an arithmetic number, because the mean of its divisors is an integer number (30025944).

Almost surely, 2^642219270 is an apocalyptic number.

642219270 is an abundant number, since it is smaller than the sum of its proper divisors (1279441146).

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

642219270 is a wasteful number, since it uses less digits than its factorization.

642219270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278045.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 642219270 is about 25342.0454975521. The cubic root of 642219270 is about 862.7688252562.

It can be divided in two parts, 642 and 219270, that added together give a palindrome (219912).

The spelling of 642219270 in words is "six hundred forty-two million, two hundred nineteen thousand, two hundred seventy".