440311431 has 16 divisors (see below), whose sum is σ = 679037184. Its totient is φ = 248574144.

The previous prime is 440311427. The next prime is 440311451. The reversal of 440311431 is 134113044.

It is not a de Polignac number, because 440311431 - 2² = 440311427 is a prime.

It is a super-2 number, since 2×440311431² = 387748312538535522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 440311398 and 440311407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (440311451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 124566 + ... + 128051.

It is an arithmetic number, because the mean of its divisors is an integer number (42439824).

Almost surely, 2^440311431 is an apocalyptic number.

440311431 is a deficient number, since it is larger than the sum of its proper divisors (238725753).

440311431 is a wasteful number, since it uses less digits than its factorization.

440311431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252710.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 440311431 is about 20983.5990954841. The cubic root of 440311431 is about 760.7698979052.

Adding to 440311431 its reverse (134113044), we get a palindrome (574424475).

The spelling of 440311431 in words is "four hundred forty million, three hundred eleven thousand, four hundred thirty-one".