440307649 has 2 divisors, whose sum is σ = 440307650. Its totient is φ = 440307648.

The previous prime is 440307643. The next prime is 440307661. The reversal of 440307649 is 946703044.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 439321600 + 986049 = 20960^2 + 993^2 .

It is a cyclic number.

It is not a de Polignac number, because 440307649 - 2⁵ = 440307617 is a prime.

It is not a weakly prime, because it can be changed into another prime (440307643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220153824 + 220153825.

It is an arithmetic number, because the mean of its divisors is an integer number (220153825).

Almost surely, 2^440307649 is an apocalyptic number.

It is an amenable number.

440307649 is a deficient number, since it is larger than the sum of its proper divisors (1).

440307649 is an equidigital number, since it uses as much as digits as its factorization.

440307649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 37.

The square root of 440307649 is about 20983.5089772898. The cubic root of 440307649 is about 760.7677197196.

The spelling of 440307649 in words is "four hundred forty million, three hundred seven thousand, six hundred forty-nine".