1226802389 has 4 divisors (see below), whose sum is σ = 1227008556. Its totient is φ = 1226596224.

The previous prime is 1226802373. The next prime is 1226802487. The reversal of 1226802389 is 9832086221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1088340100 + 138462289 = 32990^2 + 11767^2 .

It is a cyclic number.

It is not a de Polignac number, because 1226802389 - 2⁴ = 1226802373 is a prime.

It is a super-2 number, since 2×1226802389² = 3010088203312214642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1226802329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93884 + ... + 106149.

It is an arithmetic number, because the mean of its divisors is an integer number (306752139).

Almost surely, 2^1226802389 is an apocalyptic number.

It is an amenable number.

1226802389 is a deficient number, since it is larger than the sum of its proper divisors (206167).

1226802389 is an equidigital number, since it uses as much as digits as its factorization.

1226802389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206166.

The product of its (nonzero) digits is 82944, while the sum is 41.

The square root of 1226802389 is about 35025.7389500921. The cubic root of 1226802389 is about 1070.5119944687.

The spelling of 1226802389 in words is "one billion, two hundred twenty-six million, eight hundred two thousand, three hundred eighty-nine".