1228081936 has 15 divisors (see below), whose sum is σ = 2379680373. Its totient is φ = 613970880.

The previous prime is 1228081931. The next prime is 1228081949. The reversal of 1228081936 is 6391808221.

The square root of 1228081936 is 35044.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 99121936 + 1128960000 = 9956^2 + 33600^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1228081931) 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 2 ways as a sum of consecutive naturals, for example, 135796 + ... + 144556.

Almost surely, 2^1228081936 is an apocalyptic number.

1228081936 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

1228081936 is the 35044-th square number.

It is an amenable number.

1228081936 is a deficient number, since it is larger than the sum of its proper divisors (1151598437).

1228081936 is an frugal number, since it uses more digits than its factorization.

1228081936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17530 (or 8763 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 40.

The cubic root of 1228081936 is about 1070.8840441915.

The spelling of 1228081936 in words is "one billion, two hundred twenty-eight million, eighty-one thousand, nine hundred thirty-six".