642014244 has 81 divisors (see below), whose sum is σ = 1679723409. Its totient is φ = 206758080.

The previous prime is 642014201. The next prime is 642014273. The reversal of 642014244 is 442410246.

It is a happy number.

The square root of 642014244 is 25338.

It is a perfect power (a square), and thus also a powerful number.

642014244 is a `hidden beast` number, since 642 + 0 + 14 + 2 + 4 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 30935844 + 611078400 = 5562^2 + 24720^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 6233097 + ... + 6233199.

Almost surely, 2^642014244 is an apocalyptic number.

642014244 is the 25338-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 642014244

642014244 is an abundant number, since it is smaller than the sum of its proper divisors (1037709165).

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

642014244 is a wasteful number, since it uses less digits than its factorization.

642014244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298 (or 149 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

The cubic root of 642014244 is about 862.6770036221.

The spelling of 642014244 in words is "six hundred forty-two million, fourteen thousand, two hundred forty-four".