68644130 has 32 divisors (see below), whose sum is σ = 131464944. Its totient is φ = 25716736.

The previous prime is 68644129. The next prime is 68644133. The reversal of 68644130 is 3144686.

It can be written as a sum of positive squares in 8 ways, for example, as 26822041 + 41822089 = 5179^2 + 6467^2 .

It is not an unprimeable number, because it can be changed into a prime (68644133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38744 + ... + 40476.

Almost surely, 2^68644130 is an apocalyptic number.

68644130 is a deficient number, since it is larger than the sum of its proper divisors (62820814).

68644130 is a wasteful number, since it uses less digits than its factorization.

68644130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1990.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 68644130 is about 8285.1753149828. The cubic root of 68644130 is about 409.4502447397.

The spelling of 68644130 in words is "sixty-eight million, six hundred forty-four thousand, one hundred thirty".