642336770 has 16 divisors (see below), whose sum is σ = 1167655608. Its totient is φ = 254390400.

The previous prime is 642336767. The next prime is 642336809. The reversal of 642336770 is 77633246.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 638623441 + 3713329 = 25271^2 + 1927^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 316979 + ... + 318998.

Almost surely, 2^642336770 is an apocalyptic number.

642336770 is a deficient number, since it is larger than the sum of its proper divisors (525318838).

642336770 is a wasteful number, since it uses less digits than its factorization.

642336770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 636085.

The product of its (nonzero) digits is 127008, while the sum is 38.

The square root of 642336770 is about 25344.3636732114. The cubic root of 642336770 is about 862.8214392463.

The spelling of 642336770 in words is "six hundred forty-two million, three hundred thirty-six thousand, seven hundred seventy".