1128220002 has 270 divisors, whose sum is σ = 3298000563. Its totient is φ = 287292096.

The previous prime is 1128219997. The next prime is 1128220013. The reversal of 1128220002 is 2000228211.

It is a happy number.

It can be written as a sum of positive squares in 5 ways, for example, as 186896241 + 941323761 = 13671^2 + 30681^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=23751.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 134 ways as a sum of consecutive naturals, for example, 38904124 + ... + 38904152.

Almost surely, 2^1128220002 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1128220002

1128220002 is an abundant number, since it is smaller than the sum of its proper divisors (2169780561).

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

1128220002 is a wasteful number, since it uses less digits than its factorization.

1128220002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112 (or 54 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 1128220002 is about 33588.9863199234. The cubic root of 1128220002 is about 1041.0332439616.

Multiplying 1128220002 by its sum of digits (18), we get a square (20307960036 = 142506²).

1128220002 divided by its sum of digits (18) gives a square (62678889 = 7917²).

Multiplying 1128220002 by its product of nonzero digits (128), we get a square (144412160256 = 380016²).

Adding to 1128220002 its reverse (2000228211), we get a palindrome (3128448213).

The spelling of 1128220002 in words is "one billion, one hundred twenty-eight million, two hundred twenty thousand, two".