1220622336 has 144 divisors (see below), whose sum is σ = 3602944800. Its totient is φ = 397934592.

The previous prime is 1220622329. The next prime is 1220622367. The reversal of 1220622336 is 6332260221.

1220622336 is a `hidden beast` number, since 1 + 2 + 2 + 0 + 622 + 3 + 36 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 865600 + ... + 867008.

It is an arithmetic number, because the mean of its divisors is an integer number (25020450).

Almost surely, 2^1220622336 is an apocalyptic number.

1220622336 is a gapful number since it is divisible by the number (16) 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 1220622336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1801472400).

1220622336 is an abundant number, since it is smaller than the sum of its proper divisors (2382322464).

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

1220622336 is a wasteful number, since it uses less digits than its factorization.

1220622336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1484 (or 1461 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 1220622336 is about 34937.4059712509. The cubic root of 1220622336 is about 1068.7113890227.

Adding to 1220622336 its reverse (6332260221), we get a palindrome (7552882557).

The spelling of 1220622336 in words is "one billion, two hundred twenty million, six hundred twenty-two thousand, three hundred thirty-six".