642594370 has 32 divisors (see below), whose sum is σ = 1283221440. Its totient is φ = 229707840.

The previous prime is 642594361. The next prime is 642594371. The reversal of 642594370 is 73495246.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (642594371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43017 + ... + 55996.

It is an arithmetic number, because the mean of its divisors is an integer number (40100670).

Almost surely, 2^642594370 is an apocalyptic number.

642594370 is a deficient number, since it is larger than the sum of its proper divisors (640627070).

642594370 is a wasteful number, since it uses less digits than its factorization.

642594370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99090.

The product of its (nonzero) digits is 181440, while the sum is 40.

The square root of 642594370 is about 25349.4451615810. The cubic root of 642594370 is about 862.9367645751.

The spelling of 642594370 in words is "six hundred forty-two million, five hundred ninety-four thousand, three hundred seventy".