1228387979 has 16 divisors (see below), whose sum is σ = 1577597952. Its totient is φ = 929652768.

The previous prime is 1228387973. The next prime is 1228388011. The reversal of 1228387979 is 9797838221.

It is a cyclic number.

It is not a de Polignac number, because 1228387979 - 2¹² = 1228383883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1228387973) 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 15 ways as a sum of consecutive naturals, for example, 291359 + ... + 295544.

It is an arithmetic number, because the mean of its divisors is an integer number (98599872).

Almost surely, 2^1228387979 is an apocalyptic number.

1228387979 is a deficient number, since it is larger than the sum of its proper divisors (349209973).

1228387979 is a wasteful number, since it uses less digits than its factorization.

1228387979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 586946.

The product of its digits is 3048192, while the sum is 56.

The square root of 1228387979 is about 35048.3662814688. The cubic root of 1228387979 is about 1070.9729930190.

The spelling of 1228387979 in words is "one billion, two hundred twenty-eight million, three hundred eighty-seven thousand, nine hundred seventy-nine".