1420347636 has 144 divisors (see below), whose sum is σ = 3852576000. Its totient is φ = 457322112.

The previous prime is 1420347629. The next prime is 1420347659. The reversal of 1420347636 is 6367430241.

It is a happy number.

1420347636 is a `hidden beast` number, since 14 + 2 + 0 + 3 + 4 + 7 + 636 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1420347636.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4069590 + ... + 4069938.

It is an arithmetic number, because the mean of its divisors is an integer number (26754000).

Almost surely, 2^1420347636 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1420347636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1926288000).

1420347636 is an abundant number, since it is smaller than the sum of its proper divisors (2432228364).

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

1420347636 is a wasteful number, since it uses less digits than its factorization.

1420347636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500 (or 486 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 36.

The square root of 1420347636 is about 37687.4997313433. The cubic root of 1420347636 is about 1124.0825800617.

Adding to 1420347636 its reverse (6367430241), we get a palindrome (7787777877).

The spelling of 1420347636 in words is "one billion, four hundred twenty million, three hundred forty-seven thousand, six hundred thirty-six".