1228313373849 has 27 divisors (see below), whose sum is σ = 1837664711103. Its totient is φ = 790576429104.

The previous prime is 1228313373821. The next prime is 1228313373901. The reversal of 1228313373849 is 9483733138221.

It is a happy number.

The square root of 1228313373849 is 1108293.

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

1228313373849 is a `hidden beast` number, since 1 + 228 + 3 + 1 + 3 + 37 + 384 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 644097738249 + 584215635600 = 802557^2 + 764340^2 .

It is not a de Polignac number, because 1228313373849 - 2⁵ = 1228313373817 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1228313373795 and 1228313373804.

It is not an unprimeable number, because it can be changed into a prime (1228313373809) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 96415122 + ... + 96427860.

Almost surely, 2^{1228313373849} is an apocalyptic number.

1228313373849 is the 1108293-rd square number.

1228313373849 is the 554147-th centered octagonal number.

It is an amenable number.

1228313373849 is a deficient number, since it is larger than the sum of its proper divisors (609351337254).

1228313373849 is an frugal number, since it uses more digits than its factorization.

1228313373849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25542 (or 12771 counting only the distinct ones).

The product of its digits is 5225472, while the sum is 54.

The spelling of 1228313373849 in words is "one trillion, two hundred twenty-eight billion, three hundred thirteen million, three hundred seventy-three thousand, eight hundred forty-nine".