1283720436 has 36 divisors (see below), whose sum is σ = 3386047392. Its totient is φ = 409301904.

The previous prime is 1283720429. The next prime is 1283720437. The reversal of 1283720436 is 6340273821.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

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 1283720436.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1283720437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 774366 + ... + 776021.

It is an arithmetic number, because the mean of its divisors is an integer number (94056872).

Almost surely, 2^1283720436 is an apocalyptic number.

It is an amenable number.

1283720436 is an abundant number, since it is smaller than the sum of its proper divisors (2102326956).

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

1283720436 is a wasteful number, since it uses less digits than its factorization.

1283720436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1550420 (or 1550415 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The square root of 1283720436 is about 35829.0445867595. The cubic root of 1283720436 is about 1086.8179891810.

The spelling of 1283720436 in words is "one billion, two hundred eighty-three million, seven hundred twenty thousand, four hundred thirty-six".