128006996 has 24 divisors (see below), whose sum is σ = 243642504. Its totient is φ = 58492800.

The previous prime is 128006987. The next prime is 128007037. The reversal of 128006996 is 699600821.

It can be written as a sum of positive squares in 4 ways, for example, as 19096900 + 108910096 = 4370^2 + 10436^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6935 + ... + 17438.

It is an arithmetic number, because the mean of its divisors is an integer number (10151771).

Almost surely, 2^128006996 is an apocalyptic number.

It is an amenable number.

128006996 is a deficient number, since it is larger than the sum of its proper divisors (115635508).

128006996 is a wasteful number, since it uses less digits than its factorization.

128006996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24491 (or 24489 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 128006996 is about 11314.0176772003. The cubic root of 128006996 is about 503.9776014653.

It can be divided in two parts, 12 and 8006996, that added together give a palindrome (8007008).

The spelling of 128006996 in words is "one hundred twenty-eight million, six thousand, nine hundred ninety-six".