1420728518 has 12 divisors (see below), whose sum is σ = 2342441220. Its totient is φ = 645785580.

The previous prime is 1420728503. The next prime is 1420728527. The reversal of 1420728518 is 8158270241.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2935148 + ... + 2935631.

It is an arithmetic number, because the mean of its divisors is an integer number (195203435).

Almost surely, 2^1420728518 is an apocalyptic number.

1420728518 is a deficient number, since it is larger than the sum of its proper divisors (921712702).

1420728518 is a wasteful number, since it uses less digits than its factorization.

1420728518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5870803 (or 5870792 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 38.

The square root of 1420728518 is about 37692.5525535218. The cubic root of 1420728518 is about 1124.1830494928.

Adding to 1420728518 its reverse (8158270241), we get a palindrome (9578998759).

The spelling of 1420728518 in words is "one billion, four hundred twenty million, seven hundred twenty-eight thousand, five hundred eighteen".