1420247340 has 144 divisors (see below), whose sum is σ = 4554950400. Its totient is φ = 357208704.

The previous prime is 1420247317. The next prime is 1420247347. The reversal of 1420247340 is 437420241.

It is not an unprimeable number, because it can be changed into a prime (1420247347) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 898671 + ... + 900249.

It is an arithmetic number, because the mean of its divisors is an integer number (31631600).

Almost surely, 2^1420247340 is an apocalyptic number.

1420247340 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 1420247340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2277475200).

1420247340 is an abundant number, since it is smaller than the sum of its proper divisors (3134703060).

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

1420247340 is a wasteful number, since it uses less digits than its factorization.

1420247340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1876 (or 1871 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 27.

The square root of 1420247340 is about 37686.1690809772. The cubic root of 1420247340 is about 1124.0561208961.

Adding to 1420247340 its reverse (437420241), we get a palindrome (1857667581).

The spelling of 1420247340 in words is "one billion, four hundred twenty million, two hundred forty-seven thousand, three hundred forty".