642929370 has 16 divisors (see below), whose sum is σ = 1543030560. Its totient is φ = 171447824.

The previous prime is 642929369. The next prime is 642929377. The reversal of 642929370 is 73929246.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (642929377) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10715460 + ... + 10715519.

It is an arithmetic number, because the mean of its divisors is an integer number (96439410).

Almost surely, 2^642929370 is an apocalyptic number.

642929370 is an abundant number, since it is smaller than the sum of its proper divisors (900101190).

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

642929370 is a wasteful number, since it uses less digits than its factorization.

642929370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21430989.

The product of its (nonzero) digits is 163296, while the sum is 42.

The square root of 642929370 is about 25356.0519403159. The cubic root of 642929370 is about 863.0866951320.

The spelling of 642929370 in words is "six hundred forty-two million, nine hundred twenty-nine thousand, three hundred seventy".