1228479369 has 16 divisors (see below), whose sum is σ = 1765176000. Its totient is φ = 755470656.

The previous prime is 1228479323. The next prime is 1228479379. The reversal of 1228479369 is 9639748221.

It is not a de Polignac number, because 1228479369 - 2¹¹ = 1228477321 is a prime.

It is a super-2 number, since 2×1228479369² = 3018323120117276322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1228479379) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51607 + ... + 71555.

It is an arithmetic number, because the mean of its divisors is an integer number (110323500).

Almost surely, 2^1228479369 is an apocalyptic number.

It is an amenable number.

1228479369 is a deficient number, since it is larger than the sum of its proper divisors (536696631).

1228479369 is a wasteful number, since it uses less digits than its factorization.

1228479369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21544.

The product of its digits is 1306368, while the sum is 51.

The square root of 1228479369 is about 35049.6700269774. The cubic root of 1228479369 is about 1070.9995518903. Note that the first 3 decimals are identical.

The spelling of 1228479369 in words is "one billion, two hundred twenty-eight million, four hundred seventy-nine thousand, three hundred sixty-nine".