128000002 has 16 divisors (see below), whose sum is σ = 207301752. Its totient is φ = 58924800.

The previous prime is 127999981. The next prime is 128000003. The reversal of 128000002 is 200000821.

It can be written as a sum of positive squares in 4 ways, for example, as 99580441 + 28419561 = 9979^2 + 5331^2 .

It is a Harshad number since it is a multiple of its sum of digits (13).

It is not an unprimeable number, because it can be changed into a prime (128000003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4288 + ... + 16564.

Almost surely, 2^128000002 is an apocalyptic number.

128000002 is a deficient number, since it is larger than the sum of its proper divisors (79301750).

128000002 is a wasteful number, since it uses less digits than its factorization.

128000002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12693.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 128000002 is about 11313.7085873731. The cubic root of 128000002 is about 503.9684225828.

Adding to 128000002 its reverse (200000821), we get a palindrome (328000823).

The spelling of 128000002 in words is "one hundred twenty-eight million, two", and thus it is an aban number.