1440431000 has 64 divisors (see below), whose sum is σ = 3391670880. Its totient is φ = 572572800.

The previous prime is 1440430991. The next prime is 1440431011. The reversal of 1440431000 is 1340441.

It is a super-2 number, since 2×1440431000² = 4149682931522000000, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1440431000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 158582 + ... + 167418.

Almost surely, 2^1440431000 is an apocalyptic number.

1440431000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1440431000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1695835440).

1440431000 is an abundant number, since it is smaller than the sum of its proper divisors (1951239880).

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

1440431000 is a wasteful number, since it uses less digits than its factorization.

1440431000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9021 (or 9007 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 1440431000 is about 37953.0104207822. The cubic root of 1440431000 is about 1129.3558863435.

Adding to 1440431000 its reverse (1340441), we get a palindrome (1441771441).

The spelling of 1440431000 in words is "one billion, four hundred forty million, four hundred thirty-one thousand".