128143996 has 24 divisors (see below), whose sum is σ = 229662720. Its totient is φ = 62533872.

The previous prime is 128143979. The next prime is 128144039. The reversal of 128143996 is 699341821.

It is a happy number.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

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, 89341 + ... + 90763.

It is an arithmetic number, because the mean of its divisors is an integer number (9569280).

Almost surely, 2^128143996 is an apocalyptic number.

It is an amenable number.

128143996 is a deficient number, since it is larger than the sum of its proper divisors (101518724).

128143996 is a wasteful number, since it uses less digits than its factorization.

128143996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1953 (or 1951 counting only the distinct ones).

The product of its digits is 93312, while the sum is 43.

The square root of 128143996 is about 11320.0704944801. The cubic root of 128143996 is about 504.1573320434.

The spelling of 128143996 in words is "one hundred twenty-eight million, one hundred forty-three thousand, nine hundred ninety-six".