1322780076 has 72 divisors (see below), whose sum is σ = 3556141680. Its totient is φ = 413392896.

The previous prime is 1322780051. The next prime is 1322780077. The reversal of 1322780076 is 6700872231.

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 1322780076.

It is not an unprimeable number, because it can be changed into a prime (1322780077) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 56380 + ... + 76316.

Almost surely, 2^1322780076 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 1322780076, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1778070840).

1322780076 is an abundant number, since it is smaller than the sum of its proper divisors (2233361604).

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

1322780076 is a wasteful number, since it uses less digits than its factorization.

1322780076 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20063 (or 20058 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 1322780076 is about 36370.0436623329. The cubic root of 1322780076 is about 1097.7308805242.

The spelling of 1322780076 in words is "one billion, three hundred twenty-two million, seven hundred eighty thousand, seventy-six".