440642413 has 4 divisors (see below), whose sum is σ = 441414688. Its totient is φ = 439870140.

The previous prime is 440642399. The next prime is 440642417. The reversal of 440642413 is 314246044.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-440642413 is a prime.

It is a super-2 number, since 2×440642413² = 388331472268925138, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (440642417) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 385281 + ... + 386422.

It is an arithmetic number, because the mean of its divisors is an integer number (110353672).

Almost surely, 2^440642413 is an apocalyptic number.

It is an amenable number.

440642413 is a deficient number, since it is larger than the sum of its proper divisors (772275).

440642413 is an equidigital number, since it uses as much as digits as its factorization.

440642413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 772274.

The product of its (nonzero) digits is 9216, while the sum is 28.

The square root of 440642413 is about 20991.4842972097. The cubic root of 440642413 is about 760.9604736795.

Adding to 440642413 its reverse (314246044), we get a palindrome (754888457).

The spelling of 440642413 in words is "four hundred forty million, six hundred forty-two thousand, four hundred thirteen".