440442461 has 2 divisors, whose sum is σ = 440442462. Its totient is φ = 440442460.

The previous prime is 440442449. The next prime is 440442467. The reversal of 440442461 is 164244044.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 440202361 + 240100 = 20981^2 + 490^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-440442461 is a prime.

It is a super-2 number, since 2×440442461² = 387979122903473042, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (440442467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220221230 + 220221231.

It is an arithmetic number, because the mean of its divisors is an integer number (220221231).

Almost surely, 2^440442461 is an apocalyptic number.

It is an amenable number.

440442461 is a deficient number, since it is larger than the sum of its proper divisors (1).

440442461 is an equidigital number, since it uses as much as digits as its factorization.

440442461 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12288, while the sum is 29.

The square root of 440442461 is about 20986.7210635678. The cubic root of 440442461 is about 760.8453549463.

The spelling of 440442461 in words is "four hundred forty million, four hundred forty-two thousand, four hundred sixty-one".