1440442000 has 40 divisors (see below), whose sum is σ = 3482993592. Its totient is φ = 576176000.

The previous prime is 1440441991. The next prime is 1440442019. The reversal of 1440442000 is 2440441.

It can be written as a sum of positive squares in 4 ways, for example, as 20358144 + 1420083856 = 4512^2 + 37684^2 .

It is a tau number, because it is divible by the number of its divisors (40).

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, 358111 + ... + 362110.

Almost surely, 2^1440442000 is an apocalyptic number.

1440442000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1440442000 is an abundant number, since it is smaller than the sum of its proper divisors (2042551592).

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

1440442000 is an equidigital number, since it uses as much as digits as its factorization.

1440442000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 720244 (or 720228 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 1440442000 is about 37953.1553365461. The cubic root of 1440442000 is about 1129.3587611504.

Adding to 1440442000 its reverse (2440441), we get a palindrome (1442882441).

The spelling of 1440442000 in words is "one billion, four hundred forty million, four hundred forty-two thousand".