1420344140 has 72 divisors (see below), whose sum is σ = 3100159440. Its totient is φ = 546526720.

The previous prime is 1420344103. The next prime is 1420344151. The reversal of 1420344140 is 414430241.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2790206 + ... + 2790714.

It is an arithmetic number, because the mean of its divisors is an integer number (43057770).

Almost surely, 2^1420344140 is an apocalyptic number.

1420344140 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 1420344140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1550079720).

1420344140 is an abundant number, since it is smaller than the sum of its proper divisors (1679815300).

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

1420344140 is a wasteful number, since it uses less digits than its factorization.

1420344140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 683 (or 640 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 1420344140 is about 37687.4533498882. The cubic root of 1420344140 is about 1124.0816578002.

Adding to 1420344140 its reverse (414430241), we get a palindrome (1834774381).

The spelling of 1420344140 in words is "one billion, four hundred twenty million, three hundred forty-four thousand, one hundred forty".