440628817 has 2 divisors, whose sum is σ = 440628818. Its totient is φ = 440628816.

The previous prime is 440628757. The next prime is 440628827. The reversal of 440628817 is 718826044.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 412739856 + 27888961 = 20316^2 + 5281^2 .

It is a cyclic number.

It is not a de Polignac number, because 440628817 - 2⁷ = 440628689 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 440628817.

It is not a weakly prime, because it can be changed into another prime (440628827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220314408 + 220314409.

It is an arithmetic number, because the mean of its divisors is an integer number (220314409).

Almost surely, 2^440628817 is an apocalyptic number.

It is an amenable number.

440628817 is a deficient number, since it is larger than the sum of its proper divisors (1).

440628817 is an equidigital number, since it uses as much as digits as its factorization.

440628817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 86016, while the sum is 40.

The square root of 440628817 is about 20991.1604491033. The cubic root of 440628817 is about 760.9526471330.

The spelling of 440628817 in words is "four hundred forty million, six hundred twenty-eight thousand, eight hundred seventeen".