1299224538 has 12 divisors (see below), whose sum is σ = 2814986538. Its totient is φ = 433074840.

The previous prime is 1299224533. The next prime is 1299224557. The reversal of 1299224538 is 8354229921.

1299224538 is a `hidden beast` number, since 1 + 2 + 9 + 92 + 24 + 538 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1250824689 + 48399849 = 35367^2 + 6957^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1299224493 and 1299224502.

It is not an unprimeable number, because it can be changed into a prime (1299224533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 36089553 + ... + 36089588.

Almost surely, 2^1299224538 is an apocalyptic number.

1299224538 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1299224538 is an abundant number, since it is smaller than the sum of its proper divisors (1515762000).

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

1299224538 is a wasteful number, since it uses less digits than its factorization.

1299224538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72179149 (or 72179146 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 1299224538 is about 36044.7574273985. The cubic root of 1299224538 is about 1091.1758312545.

The spelling of 1299224538 in words is "one billion, two hundred ninety-nine million, two hundred twenty-four thousand, five hundred thirty-eight".