440431240 has 32 divisors (see below), whose sum is σ = 1049264280. Its totient is φ = 165809152.

The previous prime is 440431237. The next prime is 440431253. The reversal of 440431240 is 42134044.

It can be written as a sum of positive squares in 4 ways, for example, as 440412196 + 19044 = 20986^2 + 138^2 .

It is a super-6 number, since 6×440431240⁶ (a number of 53 digits) contains 666666 as substring. Note that it is a super-d number also for d = 3.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 323167 + ... + 324526.

Almost surely, 2^440431240 is an apocalyptic number.

440431240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

440431240 is an abundant number, since it is smaller than the sum of its proper divisors (608833040).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

440431240 is a wasteful number, since it uses less digits than its factorization.

440431240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 647721 (or 647717 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 440431240 is about 20986.4537261539. The cubic root of 440431240 is about 760.8388936269.

Adding to 440431240 its reverse (42134044), we get a palindrome (482565284).

The spelling of 440431240 in words is "four hundred forty million, four hundred thirty-one thousand, two hundred forty".