1228569498 has 96 divisors (see below), whose sum is σ = 3130617600. Its totient is φ = 355739904.

The previous prime is 1228569493. The next prime is 1228569509. The reversal of 1228569498 is 8949658221.

It is a happy number.

1228569498 is a `hidden beast` number, since 12 + 2 + 85 + 69 + 498 = 666.

It is a super-2 number, since 2×1228569498² = 3018766022831944008, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (1228569493) 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 47 ways as a sum of consecutive naturals, for example, 151183 + ... + 159101.

It is an arithmetic number, because the mean of its divisors is an integer number (32610600).

Almost surely, 2^1228569498 is an apocalyptic number.

1228569498 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1228569498, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1565308800).

1228569498 is an abundant number, since it is smaller than the sum of its proper divisors (1902048102).

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

1228569498 is a wasteful number, since it uses less digits than its factorization.

1228569498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7973 (or 7954 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 54.

The square root of 1228569498 is about 35050.9557358997. The cubic root of 1228569498 is about 1071.0257430120.

The spelling of 1228569498 in words is "one billion, two hundred twenty-eight million, five hundred sixty-nine thousand, four hundred ninety-eight".