1420047440 has 100 divisors (see below), whose sum is σ = 3852170484. Its totient is φ = 486807552.

The previous prime is 1420047427. The next prime is 1420047449. The reversal of 1420047440 is 447400241.

It can be written as a sum of positive squares in 2 ways, for example, as 361456144 + 1058591296 = 19012^2 + 32536^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1420047449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 188384 + ... + 195776.

Almost surely, 2^1420047440 is an apocalyptic number.

1420047440 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 1420047440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1926085242).

1420047440 is an abundant number, since it is smaller than the sum of its proper divisors (2432123044).

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

1420047440 is an frugal number, since it uses more digits than its factorization.

1420047440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7434 (or 7407 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 26.

The square root of 1420047440 is about 37683.5168210187. The cubic root of 1420047440 is about 1124.0033814060.

Adding to 1420047440 its reverse (447400241), we get a palindrome (1867447681).

The spelling of 1420047440 in words is "one billion, four hundred twenty million, forty-seven thousand, four hundred forty".