1420444640 has 48 divisors (see below), whose sum is σ = 3361629600. Its totient is φ = 567191040.

The previous prime is 1420444609. The next prime is 1420444651. The reversal of 1420444640 is 464440241.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88430 + ... + 103250.

It is an arithmetic number, because the mean of its divisors is an integer number (70033950).

Almost surely, 2^1420444640 is an apocalyptic number.

1420444640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1420444640 is an abundant number, since it is smaller than the sum of its proper divisors (1941184960).

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

1420444640 is a wasteful number, since it uses less digits than its factorization.

1420444640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15435 (or 15427 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 29.

The square root of 1420444640 is about 37688.7866612869. The cubic root of 1420444640 is about 1124.1081695774.

Adding to 1420444640 its reverse (464440241), we get a palindrome (1884884881).

The spelling of 1420444640 in words is "one billion, four hundred twenty million, four hundred forty-four thousand, six hundred forty".