1442042440 has 64 divisors (see below), whose sum is σ = 3387126960. Its totient is φ = 551992320.

The previous prime is 1442042419. The next prime is 1442042461. The reversal of 1442042440 is 442402441.

It is an interprime number because it is at equal distance from previous prime (1442042419) and next prime (1442042461).

It can be written as a sum of positive squares in 8 ways, for example, as 696643236 + 745399204 = 26394^2 + 27302^2 .

It is a super-2 number, since 2×1442042440² = 4158972797522307200, which contains 22 as substring.

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, 82294 + ... + 98266.

Almost surely, 2^1442042440 is an apocalyptic number.

1442042440 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 1442042440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1693563480).

1442042440 is an abundant number, since it is smaller than the sum of its proper divisors (1945084520).

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

1442042440 is a wasteful number, since it uses less digits than its factorization.

1442042440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16082 (or 16078 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 25.

The square root of 1442042440 is about 37974.2338961565. The cubic root of 1442042440 is about 1129.7768740019.

Adding to 1442042440 its reverse (442402441), we get a palindrome (1884444881).

The spelling of 1442042440 in words is "one billion, four hundred forty-two million, forty-two thousand, four hundred forty".