440978413 has 2 divisors, whose sum is σ = 440978414. Its totient is φ = 440978412.

The previous prime is 440978399. The next prime is 440978479. The reversal of 440978413 is 314879044.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 286895844 + 154082569 = 16938^2 + 12413^2 .

It is a cyclic number.

It is not a de Polignac number, because 440978413 - 2⁵ = 440978381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (440178413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220489206 + 220489207.

It is an arithmetic number, because the mean of its divisors is an integer number (220489207).

Almost surely, 2^440978413 is an apocalyptic number.

It is an amenable number.

440978413 is a deficient number, since it is larger than the sum of its proper divisors (1).

440978413 is an equidigital number, since it uses as much as digits as its factorization.

440978413 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 440978413 is about 20999.4860175196. The cubic root of 440978413 is about 761.1538411744.

The spelling of 440978413 in words is "four hundred forty million, nine hundred seventy-eight thousand, four hundred thirteen".